“Men who are unhappy, like men who sleep badly, are always proud of the fact.” — Bertrand Russell

“What makes us so bitter against people who outwit us is that they think themselves cleverer than we are.” — La Rochefoucauld

“Nothing hath an uglier Look to us than Reason, when it is not of our side.” — George Savile, Marquess of Halifax

“Behind every argument is someone’s ignorance.” — Louis Brandeis

“Men do not desire merely to be rich, but to be richer than other men.” — John Stuart Mill

“Philosophy consists very largely of one philosopher arguing that all others are jackasses. He usually proves it, and I should add that he usually proves that he is one himself.” — H.L. Mencken

“Love, friendship, respect, do not unite people as much as a common hatred for something.” — Anton Chekhov

“Whoever in discussion adduces authority uses not intellect but rather memory.” — Leonardo

“Wandering in a vast forest at night, I have only a faint light to guide me. A stranger appears and says to me: ‘My friend, you should blow out your candle in order to find your way more clearly.’ This stranger is a theologian.” — Diderot

“Lord Dawson was not a good doctor. King George V himself told me that he would never have died had he had another doctor.” — Margot Asquith, to the young Lord David Cecil

“Those who wish to appear wise among fools, among the wise seem foolish.” — Quintilian

“Nearly every example of faulty reasoning that has been published is accompanied by the phrase ‘of course’ or its equivalent.” — Donald E. Knuth