WIST Quotations

Thoreau, Henry David -- Walden; or, Life in the Woods, ch. 1 “Economy” (1854)

Dave — Wed, 22 Apr 2026 18:39:09 +0000

If I knew for a certainty that a man was coming to my house with the conscious design of doing me good, I should run for my life.

Henry David Thoreau (1817-1862) American philosopher and writer
Walden; or, Life in the Woods, ch. 1 “Economy” (1854)
(Source)

Stevenson, Robert Louis -- Essay (1880-01/02?), “Reflections and Remarks on Human Life,” § 6 “Right and Wrong”

Dave — Fri, 10 Apr 2026 17:15:49 +0000

It is the mark of a good action that it appears inevitable in the retrospect. We should have been cut-throats to do otherwise. And there’s an end. We ought to know distinctly that we are damned for what we do wrong; but when we have done right, we have only been gentlemen, after all. There is nothing to make a work about.

Robert Louis Stevenson (1850-1894) Scottish essayist, novelist, poet
Essay (1880-01/02?), “Reflections and Remarks on Human Life,” § 6 “Right and Wrong”
(Source)

A collection of aphorisms and musings, first published in the Edinburgh Edition of his Works, vol. 28 (1898).

Billings, Josh -- Josh Billings’ Farmer’s Allminax, 1875-07 (1875 ed.)

Dave — Thu, 09 Oct 2025 16:04:54 +0000

He who expekts to be praized every time he duz a virtewous thing will soon git tired of the bizzness.

[He who expects to be praised every time he does a virtuous thing will soon get tired of the business.]

Josh Billings (1818-1885) American humorist, aphorist [pseud. of Henry Wheeler Shaw]
Josh Billings’ Farmer’s Allminax, 1875-07 (1875 ed.)
(Source)

Bible, Vol. 2. New Testament -- Luke 6: 32-33 (Jesus) [GNT (1992 ed.)]

Dave — Tue, 26 Aug 2025 18:20:05 +0000

If you love only the people who love you, why should you receive a blessing? Even sinners love those who love them! And if you do good only to those who do good to you, why should you receive a blessing? Even sinners do that!

[καὶ εἰ ἀγαπᾶτε τοὺς ἀγαπῶντας ὑμᾶς, ποία ὑμῖν χάρις ἐστίν; καὶ γὰρ οἱ ἁμαρτωλοὶ τοὺς ἀγαπῶντας αὐτοὺς ἀγαπῶσιν. καὶ [γὰρ] ἐὰν ἀγαθοποιῆτε τοὺς ἀγαθοποιοῦντας ὑμᾶς, ποία ὑμῖν χάρις ἐστίν; καὶ οἱ ἁμαρτωλοὶ τὸ αὐτὸ ποιοῦσιν.]

The Bible (The New Testament) (AD 1st - 2nd C) Christian sacred scripture
Luke 6: 32-33 (Jesus) [GNT (1992 ed.)]
(Source)

No Synoptic parallels.

(Source (Greek)). Alternate translations:

For if ye love them which love you, what thank have ye? for sinners also love those that love them. And if ye do good to them which do good to you, what thank have ye? for sinners also do even the same.
[KJV (1611)]

If you love those who love you, what thanks can you expect? Even sinners love those who love them. And if you do good to those who do good to you, what thanks can you expect? For even sinners do that much.
[JB (1966)]

If you love those who love you, what credit can you expect? Even sinners love those who love them. And if you do good to those who do good to you, what credit can you expect? For even sinners do that much.
[NJB (1985)]

If you love those who love you, why should you be commended? Even sinners love those who love them. If you do good to those who do good to you, why should you be commended? Even sinners do that.
[CEB (2011)]

If you love those who love you, what credit is that to you? For even sinners love those who love them. If you do good to those who do good to you, what credit is that to you? For even sinners do the same.
[NRSV (2021 ed.)]

Russell, Bertrand -- Conquest of Happiness, Part 1, ch. 8 “Persecution Mania” (1930)

Dave — Wed, 20 Aug 2025 15:40:11 +0000

Another not uncommon victim of persecution mania is a certain type of philanthropist, who is always doing good to people against their will, and is amazed and horrified that they display no gratitude. Our motives in doing good are seldom as pure as we imagine them to be. Love of power is insidious; it has many disguises, and is often the source of the pleasure we derive from doing what we believe to be good to other people.

Bertrand Russell (1872-1970) English mathematician and philosopher
Conquest of Happiness, Part 1, ch. 8 “Persecution Mania” (1930)
(Source)

See Stevenson.

Rogers, Will -- Essay (1932-03-12), “Letters of a Self-Made Diplomat to Senator Borah,” Saturday Evening Post

Dave — Mon, 14 Apr 2025 20:06:28 +0000

When you put down the good things you ought to have done, and leave out the bad ones you did do — well, that’s Memoirs.

Will Rogers (1879-1935) American humorist
Essay (1932-03-12), “Letters of a Self-Made Diplomat to Senator Borah,” Saturday Evening Post
(Source)

William Borah (1885-1940) was a US Senator from Idaho (1907-1940). He was progressive politically, but an isolationist, a key figure in blocking US approval of the Versailles Treaty or joining the League of Nations.

Collected in Donald Day (ed.), The Autobiography of Will Rogers (1949), and Steven K Gragert (ed.), More Letters of a Self-Made Diplomat (1982).

Ingersoll, Robert Green -- Speech (1886-11-14), “A Lay Sermon,” American Secular Union annual congress, Chickering Hall, New York City

Dave — Sat, 09 Nov 2024 00:26:41 +0000

The barbaric world was to be rewarded in some other world for acting sensibly in this. They were promised rewards in another world, if they would only have self-denial enough to be virtuous in this. If they would forego the pleasures of larceny and murder; if they would forego the thrill and bliss of meanness here, they would be rewarded hereafter for that self-denial. I have exactly the opposite idea. Do right, not to deny yourself, but because you love yourself and because you love others. Be generous, because it is better for you. Be just, because any other course is the suicide of the soul. Whoever does wrong plagues himself, and when he reaps that harvest, he will find that he was not practicing self-denial when he did right.

Robert Green Ingersoll (1833-1899) American lawyer, freethinker, orator
Speech (1886-11-14), “A Lay Sermon,” American Secular Union annual congress, Chickering Hall, New York City
(Source)

Vonnegut, Kurt, Jr. -- Letter (1992-10-16) to Robert Maslansky

Dave — Mon, 04 Nov 2024 22:09:58 +0000

I told her that what made being alive almost worthwhile for me was all the saints I met almost anywhere, people who were behaving decently in an indecent society.

Kurt Vonnegut, Jr. (1922-2007) American novelist, journalist
Letter (1992-10-16) to Robert Maslansky
(Source)

Phrases used in a number of places by Vonnegut, often as his reply when a woman wrote him to ask if it were right to bring a child into a world as bad as this one; he then encouraged his readers or listeners to become a saint for that child. He also used the phrase to describe the underlying theme of his writing.

Other variants:

I replied that what made being alive almost worthwhile for me was the saints I met, people behaving unselfishly and capably. They turned up in the most unexpected places.
[Timequake, ch. 62 (1997)]

I replied that what made living almost worthwhile for me were the saints I met. They could be anywhere. They were people who behaved decently in an indecent society.
[Kevin Alexander Bacon, ed., At Millennium's End: New Essays on the Work of Kurt Vonnegut, Foreword (1998-11-11) (2001)]

What makes life worth living are the saints I meet -- they can be long-time friends or someone I meet on a street. They find a way to behave decently in an indecent society.
["Vonnegut Unbound," Interview by Christopher R. Blazejewski, The Harvard Crimson (2000-05-12)]

I replied that what made being alive almost worthwhile for me, besides music, was all the saints I met, who could be anywhere. By saints I meant people who behaved decently in a strikingly indecent society.
[Lecture (2003-09-22), University of Wisconsin, Madison; reprinted in "Knowing What's Nice," In These Times (2003-11-06)]

What makes life worth living are the saints. You meet saints everywhere. They can be anywhere. They are people behaving decently in an indecent society.
[Frequently quoted version]

Ingersoll, Robert Green -- Speech (1886-11-14), “A Lay Sermon,” American Secular Union annual congress, Chickering Hall, New York City

Dave — Fri, 01 Nov 2024 18:59:08 +0000

So this idea of doing good to others only for their sake is absurd. You want to do it, not simply for their sake, but for your own; because a perfectly civilized man can never be perfectly happy while there is one unhappy being in this universe.

Robert Green Ingersoll (1833-1899) American lawyer, freethinker, orator
Speech (1886-11-14), “A Lay Sermon,” American Secular Union annual congress, Chickering Hall, New York City
(Source)

Ebner-Eschenbach, Marie von -- Aphorisms [Aphorismen], No. 104 (1880) [tr. Wister (1883)]

Dave — Wed, 17 Jul 2024 17:04:24 +0000

The world would be much better off if the pains taken to analyze the subtlest moral laws were given to the practice of the simplest.

[Es stände besser um die Welt, wenn die Mühe, die man sich gibt, die subtilsten Moralgesetze auszuklüglen, zur Ausübung der einfachsten angewendet würde.]

Marie von Ebner-Eschenbach (1830-1916) Austrian writer
Aphorisms [Aphorismen], No. 104 (1880) [tr. Wister (1883)]
(Source)

(Source (German)). Alternate translation:

The world would be in better shape if people would take the same pains in the practice of the simplest moral laws as they exert in intellectualizing over the most subtle moral questions.
[tr. Scrase/Mieder (1994)]

McLaughlin, Mignon -- The Neurotic’s Notebook, ch. 8 (1963)

Dave — Wed, 31 Jan 2024 15:22:59 +0000

A little embarrassment prevents a lot of goodness.

Mignon McLaughlin (1913-1983) American journalist and author
The Neurotic’s Notebook, ch. 8 (1963)
(Source)

Turner, Tina -- Happiness Becomes You, ch. 8 (2020)

Dave — Mon, 17 Jul 2023 22:34:14 +0000

When you live with a joyful sense of purpose, when you infuse your life with a greater purpose beyond your individual self, every aspect of your karma can become a brilliant facet of your mission. You can transform sorrow and adversity of any sort into joy, stability, health, and prosperity. By changing poison into medicine and accomplishing your inner revolution, you can use every experience of karma to encourage others who suffer from the same problems that you overcame.

You can become an ambassador of hope, an essential and radiant treasure of humanity, in which you recognize that all who have ever lived are members of your extended family.

As you continue to spread light in this way, actively doing good in the world, that energy will come back to you in abundant positivity. When you refuse to perpetuate any bad that has been done to you, you can free yourself from the chains of negativity.

Tina Turner (1939-2023) American singer, songwriter, actress [b. Anna Mae Bullock]
Happiness Becomes You, ch. 8 (2020)
(Source)

Child, Lydia Maria -- Letter to John Fraser (1868)

Dave — Tue, 06 Jun 2023 20:10:48 +0000

All who strive to live for something beyond mere selfish aims find their capacities for doing good very inadequate to their aspirations. They do so much less than they want to do, and so much less than they, at the outset, expected to do, that their lives, viewed retrospectively, inevitably look like failure.

Lydia Maria Child (1802-1880) American abolitionist, activist, journalist, suffragist
Letter to John Fraser (1868)
(Source)

King, Martin Luther -- “Remaining Awake Through a Great Revolution,” National Cathedral, Washington, DC (31 Mar 1968)

Dave — Mon, 16 Jan 2023 19:23:03 +0000

Somewhere we must come to see that human progress never rolls in on the wheels of inevitability. It comes through the tireless efforts and the persistent work of dedicated individuals who are willing to be coworkers with God. And without this hard work, time itself becomes an ally of the primitive forces of social stagnation. So we must have time and realize that the time is always right to do right.

Martin Luther King, Jr. (1929-1968) American clergyman, civil rights leader, social activist, preacher
“Remaining Awake Through a Great Revolution,” National Cathedral, Washington, DC (31 Mar 1968)
(Source)

Jefferson, Thomas -- Letter (1819-06-25) to Ezra Styles Ely

Dave — Mon, 03 Oct 2022 16:12:11 +0000

The benevolent and sublime reformer [Jesus] of that religion [Judaism] has told us only that god is good and perfect, but has not defined him. I am therefore of his theology, believing that we have neither words nor ideas adequate to that definition. and if we could all, after his example, leave the subject as undefinable, we should all be of one sect, doers of good & eschewers of evil. No doctrines of his lead to schism.

Thomas Jefferson (1743-1826) American political philosopher, polymath, statesman, US President (1801-09)
Letter (1819-06-25) to Ezra Styles Ely
(Source)

Aristotle -- Nicomachean Ethics [Ἠθικὰ Νικομάχεια], Book 1, ch. 9 (1.9, 1099a.4) (c. 325 BC) [tr. Crisp (2000)]

Dave — Tue, 26 Oct 2021 17:26:34 +0000

As in the Olympic Games it is not the most attractive and the strongest who are crowned, but those who compete (since it is from this group that winners come), so in life it is those who act rightly who will attain what is noble and good.

[ὥσπερ δ᾽ Ὀλυμπίασιν οὐχ οἱ κάλλιστοι καὶ ἰσχυρότατοι στεφανοῦνται ἀλλ᾽ οἱ ἀγωνιζόμενοι （τούτων γάρ τινες νικῶσιν）, οὕτω καὶ τῶν ἐν τῷ βίῳ καλῶν κἀγαθῶν οἱ πράττοντες ὀρθῶς ἐπήβολοι γίνονται.]

Aristotle (384-322 BC) Greek philosopher
Nicomachean Ethics [Ἠθικὰ Νικομάχεια], Book 1, ch. 9 (1.9, 1099a.4) (c. 325 BC) [tr. Crisp (2000)]
(Source)

(Source (Greek)). Alternate translations:

And as at the Olympic games it is not the finest and strongest men who are crowned, but they who enter the lists, for out of these the prize-men are selected; so too in life, of the honourable and the good, it is they who act who rightly win the prizes.
[tr. Chase (1847), ch. 6]

For as at the Olympic games it is not the fairest and the strongest who are crowned, but they that run -- for some of these it is that win the victory -- so too, among the noble and good in life, it is they that act rightly who become masters of life's prize.
[tr. Williams (1869)]

As in the Olympian games it is not the most beautiful and strongest persons who receive the crown, but they who actually enter the lists as combatants -- for it is some of these who become victors -- so it is they who act rightly that attain what is noble and good in life.
[tr. Welldon (1892), ch. 9]

And as at the Olympic games it is not the fairest and strongest who receive the crown, but those who contend (for among these are the victors), so in life, too, the winners are those who not only have all the excellences, but manifest these in deed.
[tr. Peters (1893)]

And as in the Olympic Games it is not the most beautiful and the strongest that are crowned but those who compete (for it is some of these that are victorious), so those who act win, and rightly win, the noble and good things in life.
[tr. Ross (1908)]

And just as at the Olympic games the wreaths of victory are not bestowed upon the handsomest and strongest persons present, but on men who enter for the competitions -- since it is among these that the winners are found, -- so it is those who act rightly who carry off the prizes and good things of life.
[tr. Rackham (1934), ch. 8, sec. 9]

And just as in the Olympic Games it is not the noblest and strongest who get the victory crown but the competitors (since it is among these that the ones who win are found), so also among the noble and good aspects of life it is those who act correctly who win the prizes.
[tr. Reeve (1948)]

And as at the Olympic Games it is not the most beautiful or the strongest who are crowned but those who compete (for it is some of these who become victors), so in life it is those who act rightly who become the winners of good and noble things.
[tr. Apostle (1975), ch. 9]

Just as at the Olympic Games it is not the best-looking or the strongest men present that are crowned with wreaths, but the competitors (because it is from them that the winners come), so it is those who act that rightly win the honors and rewards in life.
[tr. Thomson/Tredennick (1976)]

For just as it is not the noblest and strongest who are crowned with the victory wreath at the Olympic Games but rather the competitors (for it is certain of these who win), so also it is those who act correctly who attain the noble and good things in life.
[tr. Bartlett/Collins (2011)]

Pratchett, Terry -- Discworld No. 13, Small Gods (1992)

Dave — Tue, 26 Jan 2021 17:27:10 +0000

What have I always believed? That on the whole, and by and large, if a man lived properly, not according to what any priests said, but according to what seemed decent and honest inside, then it would, at the end, more or less, turn out all right.

Terry Pratchett (1948-2015) English author
Discworld No. 13, Small Gods (1992)

James, William -- Letter to E. L. Godkin (24 Dec 1895)

Dave — Thu, 29 Oct 2020 17:13:45 +0000

We are all ready to be savage in some cause. The difference between a good man and a bad one is the choice of the cause.

William James (1842-1910) American psychologist and philosopher
Letter to E. L. Godkin (24 Dec 1895)
(Source)

Franklin, Benjamin -- Letter to Josiah and Abiah Franklin (13 Apr 1738)

Dave — Thu, 01 Oct 2020 15:54:56 +0000

I think vital Religion has always suffer’d, when Orthodoxy is more regarded than Virtue. And the Scripture assures me, that at the last Day, we shall not be examin’d what we thought, but what we did; and our Recommendation will not be that we said Lord, Lord, but that we did GOOD to our Fellow Creatures.

Benjamin Franklin (1706-1790) American statesman, scientist, philosopher, aphorist
Letter to Josiah and Abiah Franklin (13 Apr 1738)
(Source)

His parents. Franklin cites Matt. 26 in the letter, but it should be Matt. 25:31-46.

Bible, Vol. 1. Old Testament -- Book 23. Isaiah 1:16ff (Isa 1:16-17) [tr. JPS (1985)]

Dave — Tue, 27 Nov 2018 01:37:32 +0000

Wash yourselves clean; put your evil doings away from My sight. Cease to do evil; learn to do good. Devote yourselves to justice; aid the wronged. Uphold the rights of the orphan; defend the cause of the widow.

The Bible (The Old Testament) (14th - 2nd C BC) Judeo-Christian sacred scripture [Tanakh, Hebrew Bible], incl. the Apocrypha (Deuterocanonicals)
Book 23. Isaiah 1:16ff (Isa 1:16-17) [tr. JPS (1985)]
(Source)

Alternate translations:

Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil; learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.
[KJV (1611)]

Wash yourselves, make yourselves clean; Remove the evil of your deeds from My sight. Cease to do evil, learn to do good; seek justice, reprove the ruthless, refend the orphan, plead for the widow.
[NASB (1960)]

Wash, make yourselves clean. Take your wrong-doing out of my sight. Cease to do evil. Learn to do good, search for justice, help the oppressed, be just to the orphan, plead for the widow.
[JB (1966)]

Wash yourselves clean. Stop all this evil that I see you doing. Yes, stop doing evil and learn to do right. See that justice is done -- help those who are oppressed, give orphans their rights, and defend widows.
[GNT (1976)]

Wash yourselves; make yourselves clean; remove the evil of your doings from before my eyes; cease to do evil; learn to do good; seek justice; rescue the oppressed; defend the orphan; plead for the widow.
[NRSV (1989 ed.)]

Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil, learn to do good; seek justice, correct oppression; bring justice to the fatherless; plead the widow's cause.
[ESV (2001)]

Hill, Rowland -- (Attributed)

Dave — Thu, 15 Dec 2016 06:05:20 +0000

We can do more good by being good than in any other way.

Rowland Hill (1795-1879) English teacher, inventor, social reformer.
(Attributed)

Quoted in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895).

Rousseau, Jean-Jacques -- Emile, ch. 4 (1762) [tr. Foxley (1911)]

Dave — Tue, 19 Jan 2016 14:18:28 +0000

By doing good we become good.

Jean-Jacques Rousseau (1712-1778) French philosopher and writer
Emile, ch. 4 (1762) [tr. Foxley (1911)]

Montaigne, Michel de -- Essays, Book 3, ch. 2 (3.2), “Of Repentance [Du Repentir]” (1586) [tr. Frame (1943)]

Dave — Tue, 24 Nov 2015 15:18:37 +0000

There is a sort of gratification in doing good which makes us rejoice in ourselves, and a generous pride that accompanies a good conscience.

[Il y a certes je ne sçay quelle congratulation, de bien faire, qui nous resjouit en nous mesmes, et une fierté genereuse, qui accompagne la bonne conscience.]

Michel de Montaigne (1533-1592) French essayist
Essays, Book 3, ch. 2 (3.2), “Of Repentance [Du Repentir]” (1586) [tr. Frame (1943)]
(Source)

First appeared in the 1588 edition.

(Source (French)). Alternate translations:

There is truely I wot not what kinde of congratulation, of well doing, which rejoyceth us in our selves, and a generous jollitie, that accompanieth a good conscience.
[tr. Florio (1603)]

There is a kind of I know not what congratulation in well-doing, that gives us an inward Satisfaction, and a certain generous Boldness that accompanies a good Conscience.
[tr. Cotton (1686)]

There is a kind of, I know not what, congratulation in well-doing that gives us an inward satisfaction, and a generous boldness that accompanies a good conscience.
[tr. Cotton/Hazlitt (1877)]

There is surely I know not what self-gratification in doing well, which rejoices us ourselves, and a noble pride which attends a good conscience.
[tr. Ives (1925)]

There is an unutterable delight in acting well which makes us inwardly rejoice; a noble feeling of pride accompanies a good conscience.
[tr. Screech (1987)]

Francis I (Pope) -- Homily (22 May 2013)

Dave — Mon, 05 Oct 2015 16:25:52 +0000

The Lord has redeemed all of us, all of us, with the Blood of Christ: all of us, not just Catholics. Everyone! “Father, the atheists?” Even the atheists. Everyone! And this Blood makes us children of God of the first class. We are created children in the likeness of God and the Blood of Christ has redeemed us all. And we all have a duty to do good. And this commandment for everyone to do good, I think, is a beautiful path towards peace. If we, each doing our own part, if we do good to others, if we meet there, doing good, and we go slowly, gently, little by little, we will make that culture of encounter: We need that so much. We must meet one another doing good. “But I don’t believe, Father, I am an atheist!” But do good: We will meet one another there.

Francis I (1936-2025) Argentinian Catholic Pope (2013–2025) [b. Jorge Mario Bergoglio]
Homily (22 May 2013)
(Source)

Francis I (Pope) -- Homily (22 May 2013)

Dave — Mon, 28 Sep 2015 14:28:16 +0000

The Lord created us in His image and likeness, and we are the image of the Lord, and He does good and all of us have this commandment at heart: do good and do not do evil. All of us. “But, Father, this is not Catholic! He cannot do good.” Yes, he can. He must. Not can: must! Because he has this commandment within him. Instead, this “closing off” that imagines that those outside, everyone, cannot do good is a wall that leads to war and also to what some people throughout history have conceived of: killing in the name of God. That we can kill in the name of God. And that, simply, is blasphemy. To say that you can kill in the name of God is blasphemy.

Francis I (1936-2025) Argentinian Catholic Pope (2013–2025) [b. Jorge Mario Bergoglio]
Homily (22 May 2013)
(Source)

Clarke, James F. -- (Attributed)

Dave — Fri, 24 Oct 2014 13:18:46 +0000

We must be something in order to do something, but we must also do something in order to be something. The best rule, I think, is this: If we find it hard to do good, then let us try to be good. If, on the other hand, we find it hard to be good, then let us try to do good. Being leads to doing, doing leads to being. Yet below both as their common root is faith, — faith in God, in man, in ourselves, in the eternal superiority of right over wrong, truth over error, good over evil, love over all selfishness and all sin.

James Freeman Clarke (1810-1888) American theologian and author
(Attributed)

Quoted in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895).

Bible, Vol. 2. New Testament -- James 4: 17 [NRSV (2021 ed.)]

Dave — Fri, 30 May 2014 12:58:43 +0000

Anyone, then, who knows the right thing to do and fails to do it, commits sin.

[εἰδότι οὖν καλὸν ποιεῖν καὶ μὴ ποιοῦντι ἁμαρτία αὐτῷ ἐστιν.]

The Bible (The New Testament) (AD 1st - 2nd C) Christian sacred scripture
James 4: 17 [NRSV (2021 ed.)]
(Source)

(Source (Greek)). Alternate translations:

Therefore to him that knoweth to do good, and doeth it not, to him it is sin.
[KJV (1611)]

Everyone who knows what is the right thing to do and doesn't do it commits a sin.
[JB (1966)]

So then, if we do not do the good we know we should do, we are guilty of sin.
[GNT (1976)]

Everyone who knows what is the right thing to do and does not do it commits a sin.
[NJB (1985)]

It is a sin when someone knows the right thing to do and doesn’t do it.
[CEB (2011)]

If anyone, then, knows the good they ought to do and doesn't do it, it is sin for them.
[NIV (2011 ed.)]

Twain, Mark -- Letter (1901-02-16) to the Young People’s Society, Greenpoint Presbyterian Church, Brooklyn

Dave — Mon, 26 Aug 2013 12:08:02 +0000

Always do right. This will gratify some people, and astonish the rest.

Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]
Letter (1901-02-16) to the Young People’s Society, Greenpoint Presbyterian Church, Brooklyn
(Source)

The Society had invited Twain to come and speak. In response, he sent a card with this aphorism on it. A reproduction is in the frontispiece of Bernard DeVoto, ed., Mark Twain in Eruption (1922), which was the earliest citation I could find.

Johnson, Lyndon -- Quoted in George Christian, The President Steps Down, ch. 1, sec. 3 (1970).

Dave — Wed, 12 Dec 2012 14:08:38 +0000

Every President wants to do right.

Lyndon B. Johnson (1908-1973) American politician, educator, US President (1963-69)
Quoted in George Christian, The President Steps Down, ch. 1, sec. 3 (1970).
(Source)

Christian, who was Johnson's press secretary, says this was a frequent comment by Johnson, who would then go on to defend previous Administrations, Democratic and Republican, from the worst accusations of their then-detractors.

Franklin, Benjamin -- Poor Richard (1737 ed.)

Dave — Mon, 26 Nov 2012 13:44:49 +0000

The noblest question in the world is, What Good may I do in it?

Benjamin Franklin (1706-1790) American statesman, scientist, philosopher, aphorist
Poor Richard (1737 ed.)
(Source)

Bible, Vol. 2. New Testament -- Romans 12: 19-21 [NRSV (2021 ed.)]

Dave — Thu, 01 Sep 2011 12:20:25 +0000

Beloved, never avenge yourselves, but leave room for the wrath of God, for it is written, “Vengeance is mine; I will repay, says the Lord.” Instead, “if your enemies are hungry, feed them; if they are thirsty, give them something to drink, for by doing this you will heap burning coals on their heads.” Do not be overcome by evil, but overcome evil with good.

[μὴ ἑαυτοὺς ἐκδικοῦντες, ἀγαπητοί, ἀλλὰ δότε τόπον τῇ ὀργῇ, γέγραπται γάρ, ” Ἐμοὶ ἐκδίκησις, ἐγὼ ἀνταποδώσω,” λέγει κύριος. ἀλλ᾽ ” ἐὰν πεινᾷ ὁ ἐχθρός σου, ψώμιζε αὐτόν· ἐὰν διψᾷ, πότιζε αὐτόν· τοῦτο γὰρ ποιῶν ἄνθρακας πυρὸς σωρεύσεις ἐπὶ τὴν κεφαλὴν αὐτοῦ.” μὴ νικῶ ὑπὸ τοῦ κακοῦ ἀλλὰ νίκα ἐν τῷ ἀγαθῷ τὸ κακόν.]

The Bible (The New Testament) (AD 1st - 2nd C) Christian sacred scripture
Romans 12: 19-21 [NRSV (2021 ed.)]
(Source)

The two passages quoted are Deut. 32:35 and Proverbs 25:21-22.

(Source (Greek)). Alternate translations:

Dearly beloved, avenge not yourselves, but rather give place unto wrath: for it is written, Vengeance is mine; I will repay, saith the Lord. Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head. Be not overcome of evil, but overcome evil with good.
[KJV (1611)]

Never try to get revenge; leave that, my friends, to God's anger. As scripture says: vengeance is mine - I will pay them back, the Lord promises. But there is more: If your enemy is hungry, you should give him food, and if he is thirsty, let him drink. Thus you heap red-hot coals on his head. Resist evil and conquer it with good.
[JB (1966)]

Never try to get revenge: leave that, my dear friends, to the Retribution. As scripture says: Vengeance is mine -- I will pay them back, the Lord promises. And more: If your enemy is hungry, give him something to eat; if thirsty, something to drink. By this, you will be heaping red-hot coals on his head. Do not be mastered by evil, but master evil with good.
[NJB (1985)]

Never take revenge, my friends, but instead let God's anger do it. For the scripture says, “I will take revenge, I will pay back, says the Lord.” Instead, as the scripture says: “If your enemies are hungry, feed them; if they are thirsty, give them a drink; for by doing this you will make them burn with shame.” Do not let evil defeat you; instead, conquer evil with good.
[GNT (1992 ed.)]

Don’t try to get revenge for yourselves, my dear friends, but leave room for God’s wrath. It is written, Revenge belongs to me; I will pay it back, says the Lord. Instead, If your enemy is hungry, feed him; if he is thirsty, give him a drink. By doing this, you will pile burning coals of fire upon his head. Don’t be defeated by evil, but defeat evil with good.
[CEB (2011)]

La Rochefoucauld, Francois -- Réflexions ou sentences et maximes morales [Reflections; or Sentences and Moral Maxims], ¶230 (1665-1678) [tr. Tancock (1959)]

Dave — Thu, 14 Jan 2010 14:59:46 +0000

Nothing is so contagious as an example, and our every really good or bad action inspires a similar one.

[Rien n’est si contagieux que l’exemple, et nous ne faisons jamais de grands biens ni de grands maux qui n’en produisent de semblables.]

François VI, duc de La Rochefoucauld (1613-1680) French epigrammatist, memoirist, noble
Réflexions ou sentences et maximes morales [Reflections; or Sentences and Moral Maxims], ¶230 (1665-1678) [tr. Tancock (1959)]
(Source)

In the manuscript and 1665 ed., this concluded "... nor are there any great evils that do not inevitably produce their like [ni de grands maux qui ne produisent infailliblement leurs pareils]."

(Source (French)). Other translations:

There is not any thing so contagious as Example, and whatever actions are done remarkable either for their Goodness or Mischief, they are Patterns to others to do the like.
[tr. Davies (1669), ¶48]

Nothing is of so pestilent spreading a Nature, as Example; and no Man does any exceeding good, or very wicked thing; but it produces others of the same kind.
[tr. Stanhope (1694), ¶231]

Nothing is so contagious as example: never is any considerable good or ill done that does not produce its like.
[pub. Donaldson (1783), ¶122; ed. Lepoittevin-Lacroix (1797), ¶219]

Nothing is so contagious as example. Never was there any considerable good or ill action, that hath not produced its like.
[ed. Carvill (1835), ¶469]

Nothing is so contagious as example; and we never do any great good or great evil which does not produce its like.
[ed. Gowens (1851), ¶241]

Nothing is so infectious as example, and we never do great good or evil without producing the like.
[tr. Bund/Friswell (1871), ¶230]

Nothing is as contagoius as example. Each of our very good or very bad acts reproduces itself.
[tr. Heard (1917), ¶237]

Nothing is so contagious as example, and all our very good or bad deeds beget their like.
[tr. Stevens (1939), ¶230]

Nothing is as contagious as example, and we never perform an outstandingly good or evil action without its producing others of its sort.
[tr. FitzGibbon (1957), ¶230]

Nothing is so contagious as example, and we never commit good or evil acts without their propagating themselves.
[tr. Kronenberger (1959), ¶230]

Nothing is so contagious as example, and we never do either great good nor great evil without producing the like.
[tr. Whichello (2016) ¶230]

Smith, Sydney -- Memoir of the Reverend Sydney Smith, by His Daughter, Lady Holland, Vol. 1, ch. 12 (1855)

Dave — Fri, 02 Jan 2009 14:44:11 +0000

We know nothing of tomorrow; our business is to be good and happy today.

Sydney Smith (1771-1845) English clergyman, essayist, wit
Memoir of the Reverend Sydney Smith, by His Daughter, Lady Holland, Vol. 1, ch. 12 (1855)
(Source)

Socrates -- In Plato, Apology, sec. 28b [tr. Jowett]

Dave — Tue, 24 Jul 2007 13:43:48 +0000

A man who is good for anything ought not to calculate the chance of living or dying; he ought only to consider whether in doing anything he is doing right or wrong — acting the part of a good man or a bad.

Socrates (c.470-399 BC) Greek philosopher
In Plato, Apology, sec. 28b [tr. Jowett]
(Source)

Alternate translations:

"Thou doest wrong to think that a man of any use at all is to weigh the risk of life or death, and not to consider one thing only, whether when he acts he does the right thing or the wrong, performs the deeds of a good man or a bad." ["No Evil Can Happen to a Good Man"]
"You are mistaken, my friend, if you think that a man who is worth anything ought to spend his time weighing up the prospects of life and death. He has only one thing to consider in performing any action -- that is, whether he is acting rightly or wrongly, like a good man or a bad one." [tr. Trendennick]

Aesop -- Fables [Aesopica], “The Lion and the Mouse” (6th C BC)

Dave — Sun, 01 Feb 2004 16:00:00 +0000

No act of kindness, no matter how small, is ever wasted.

Aesop (620?-560? BC) Legendary Greek storyteller
Fables [Aesopica], “The Lion and the Mouse” (6th C BC)

Alternate translation: "Kindness is seldom thrown away" [tr. James (1848)]