“Whenever anything is being accomplished, it is being done, I have learned, by a monomaniac with a mission.”

Address on sentencing (1885)
Context: The Court. has done the work for me, and although at first appearance it seems to be against me, I am so confident in the idea which I have had the honor to express yesterday, that I think it is for good and not for my loss. Up to this moment, I have been considered by a certain party as insane, by another party as a criminal, by another party as a man with whom it was doubtful whether to have any intercourse. So there was hostility and there was contempt, and there was avoidance To-day, by the verdict of the Court, one of these three situations has disappeared.
I suppose that after having been condemned, I will cease to be called a fool, and for me it is a great advantage. I consider it as a great advantage. If I have a mission, I say "If " for the sake of those who doubt, but for my part it means "Since," since I have a mission, I cannot fulfil my mission as long as I am looked upon as an insane being-human being, at the moment that I begin to ascend that scale, I begin to succeed.

Misattributed, Jackson's personal book of maxims

On being driven away by her mother-in-law Indira Gandhi, as quoted in "Son's Widow Quits Gandhi Household" http://www.nytimes.com/1982/03/31/world/son-s-widow-quits-gandhi-household.html, The New York Times (31 March 1982)
1981-1990

§ 7
From Lives and Opinions of the Eminent Philosophers by Diogenes Laërtius

Source: A Treatise On Political Economy (Fourth Edition) (1832), Book I, On Production, Chapter VIII, p. 98 (See also: Adam Smith)

Source: The Fiery Cross

Book 1; On the necessity of standards
Mozi

Response to the question "You write, "Enlightenment is to be emptied (not empty) of feelings and thus at one with the purest sensation of divine being." What's the distinction here between being "emptied" and being "empty" of feelings?"
Love is not a feeling ~ The Interview (1995)