WIST

It has pleased God that divine verities should not enter the heart through the understanding, but the understanding through the heart.

Blaise Pascal (1623-1662) French scientist and philosopher
(Attributed)

It appears from this, that whatever it may be of which we wish to persuade men, it is necessary to have regard to the person whom we wish to persuade, of whom we must know the mind and the heart, what principles he acknowledges, what things he loves

Blaise Pascal (1623-1662) French scientist and philosopher
(Attributed)

We sometimes learn more from the sight of evil than from an example of good; and it is well to accustom ourselves to profit by the evil which is so common, while that which is good is so rare.

Blaise Pascal (1623-1662) French scientist and philosopher
(Attributed)

Experience makes us see an enormous difference between piety and goodness.

Blaise Pascal (1623-1662) French scientist and philosopher
(Attributed)

If all men knew what others say of them, there would not be four friends in the world.

Blaise Pascal (1623-1662) French scientist and philosopher
(Attributed)

I have only made this [letter] longer, because I have not had the time to make it shorter.

[Je n'ai fait celle-ci plus longue que parce que je n'ai pas eu le loisir de la faire plus courte.]

Blaise Pascal (1623-1662) French scientist and philosopher
Lettres provinciales, letter 16 (1657)
Sometimes attributed to Ben Franklin or Mark Twain. For more information see here.

People are generally better persuaded by the reasons which they have themselves discovered than by those which have come into the mind of others.

Blaise Pascal (1623-1662) French scientist and philosopher
On Mind and On Style

The present letter is a very long one, simply because I had no leisure to make it shorter.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensées, The Provincial Letters, #16

The heart has its reasons, which reason does not know. We feel it in a thousand things. It is the heart which experiences God, and not the reason. This, then, is faith: God felt by the heart, not by the reason.

[Le coeur a ses raisons, que la raison ne connaît point. On le sent en mille choses. C'est le cœur qui sent Dieu, et non la raison. Voilà ce que c'est que la foi parfaite, Dieu sensible au cœur.]

Blaise Pascal (1623-1662) French scientist and philosopher
Pensées (1670)

All the trouble in the world is due to the fact that a man cannot sit still in a room.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensées (1670)

Men never do evil so completely and cheerfully as when they do it from religious convictions.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensees (1670)

Justice without might is helpless; might without justice is tyrannical.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensees, #298 (1670) [tr. Trotter (1931)]

It is natural for the mind to believe, and for the will to love; so that, for want of true objects, they must attach themselves to false.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensées, #81 (1670) [tr. W. Totter (1931)]

The most powerful cause of error is the war existing between the senses and reason.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensees, 82 (1670) [tr. Trotter (1931)]

The multitude which is not brought to act as a unity is confusion. That unity which has not its origin in the multitude is tyranny.

Blaise Pascal (1623-1662) French scientist and philosopher
Pensees, ch. 24, #77

Alt. trans.: "The multitude which is not reduced to the unity is confusion; the unity which does not depend on the multitude is tyranny." 

Full text.