“If pity was always equally alive and acting in all individuals and in all circumstances, we could do away with moral. Unfortunately, it is not compassion, but rather it's contrary, selfishness, that act most strongly in us.”

Aphorism 48
Les Caractères (1688), Du Coeur

1900s, The Strenuous Life: Essays and Addresses (1900), National Duties
Context: Besides each one of us working individually, all of us have got to work together. We cannot possibly do our best work as a nation unless all of us know how to act in combination as well as how to act each individually for himself. The acting in combination can take many forms, but of course its most effective form must be when it comes in the shape of law —that is, of action by the community as a whole through the lawmaking body.

"Nietzscheism and Realism" from The Rainbow, Vol. I, No. 1 (October 1921); reprinted in "To Quebec and the Stars", and also in Collected Essays, Volume 5: Philosophy edited by S. T. Joshi, p. 71
Non-Fiction
Context: The undesirability of any system of rule not tempered with the quality of kindness is obvious; for "kindness" is a complex collection of various impulses, reactions and realisations highly necessary to the smooth adjustment of botched and freakish creatures like most human beings. It is a weakness basically—or, in some cases, and ostentation of secure superiority—but its net effect is desirable; hence it is, on the whole, praiseworthy. Since all motives at bottom are selfish and ignoble, we may judge acts and qualities only be their effects. Pessimism produces kindness. The disillusioned philosopher is even more tolerant than the priggish bourgeois idealist with his sentimental and extravagant notions of human dignity and destiny.

Seventy faces: articles of faith (2002)

Vorkosigan Saga, The Warrior's Apprentice (1986)
Context: Acting or reacting, we carry him in us. You can't walk away from him any more than I can. Whether you travel toward or away, he'll be the compass. He'll be the glass, full of subtle colors and astigmatisms, through which all new things will be viewed. I too have a father who haunts me, and I know.

"The One Un-American Act," Speech to the Author's Guild Council in New York, on receiving the 1951 Lauterbach Award (December 3, 1952) http://ala.org/ala/aboutala/offices/oif/foryoungpeople/theoneunamerican/oneunamerican.cfm
Other speeches and writings

New York Times (July 2, 2004)

Source: Night-Thoughts (1742–1745), Night II, Line 90.