Quotations about:
    affection

Let the rigour of a master over his slaves be applied by those who hold men under the empire of oppression; but they who rule by the principle of fear in a free state, practice a system of unparalleled madness. […] Let us therefore embrace that mode of conduct which has the most extensive influence, which contributes most, not only to the safety, but to the increase of wealth and power, and which rests, not upon fear, but upon the continuation of kind affections. — This is the method by which not only in private, but in public, we shall most easily obtain what we desire.

[Sed iis, qui vi oppresses imperio coercent, sit sane adhibenda saevitia, ut eris in famulos, si aliter teneri non possunt; qui vero in libera civitate ita se instruunt, ut metuantur, iis nihil potest esse dementius. […] Quod igitur latissime patet neque ad incolumitatem solum, sed etiam ad opes et potentiam valet plurimum, id amplectamur, ut metus absit, caritas retineatur. Ita facillime, quae volemus, et privatis in rebus et in re publica consequemur.]

Marcus Tullius Cicero (106-43 BC) Roman orator, statesman, philosopher

De Officiis [On Duties; On Moral Duty; The Offices], Book 2, ch. 7 (2.7) / sec. 24 (44 BC) [tr. McCartney (1798)]
    (Source)

(Source (Latin)). Alternate translations:

It is well enough in those who by open force have reduced any nation, and accordingly rule it with a high hand, if they do sometimes use rigour and severity, like masters towards their slaves when there is no other way of holding them in subjection: but for those who are magistrates in a free city, to endeavour to make themselves feared by the people, is one of the maddest and most desperate attempts on the face of the earth. [...] Let us therefore embrace and adhere to that method which is of the most universal influence, and serves not only to secure us what we have, but moreover to enlarge our power and authority; that is, in short, let us rather endeavour to be loved than feared, which is certainly the best way to make us successful, as well in our private as our public business.
[tr. Cockman (1699)]

But the truth is, cruelty must be employed by those who keep others in subjection by force; as by a master to his slaves, if they cannot otherwise be managed. But of all madmen, they are the maddest who, in a free state so conduct themselves as to be feared. [...] We ought therefore to follow this most obvious principle, that dread should be removed and affection reconciled, which has the greatest influence not only on our security but also on our interest and power; and thus we shall most easily attain to the object of our wishes, both in private and political affairs.
[tr. Edmonds (1865)]

Those who hold under their command subjects forcibly kept down must indeed resort to severity, as masters toward their slaves when they cannot otherwise be restrained. But nothing can be more mad than the policy of those who in a free state conduct themselves in such a way as to be feared. [...] Let us then embrace the policy which has the widest scope, and is most conducive, not to safety alone, but to affluence and power, namely, that by which fear may be suppressed, love retained. Thus shall we most easily obtain what we desire both in private and in public life.
[tr. Peabody (1883)]

Let tyrants exercise cruelty, as a master does towards his slaves when he cannot control them by other means: but for a Citizen of a free State to equip himself with the weapons of intimidation is the height of madness. [...] Let us then put away fear and cleave to love; love appeals to every heart, it is the surest means of gaining safety, influence and power; in a word, it is the key to success both in private and in public life.
[tr. Gardiner (1899)]

But those who keep subjects in check by force would of course have to employ severity -- masters, for example, toward their servants, when these cannot be held in control in any other way. But those who in a free state deliberately put themselves in a position to be feared are the maddest of the mad. [...] Let us, then, embrace this policy, which appeals to every heart and is the strongest support not only of security but also of influence and power -- namely, to banish fear and cleave to love. And thus we shall most easily secure success both in private and in public life.
[tr. Miller (1913)]

Men who dominate and command other men, whom they have subjugated by force, have to apply some harshness, just as the owner uses harshness toward his slaves if he cannot control them any other way. But it is completely senseless for men in a free city act in such a way that it causes others to live in fear: no one could be more insane. [...] So let us embrace a rule that applies widely and that is extremely effective not only maintaining safety but also in acquiring wealth and power, namely, that there should be no fear, that one should hold affection dear. This is the easiest way for ust to attain what we want both in private affairs and in the government.
[tr. Edinger (1974)]