"Not to be absolutely certain is, I think, one of the essential things in rationality."

"It is undesirable to believe a proposition when there is no ground whatsoever for supposing it is true."

"To be able to fill leisure intelligently is the last product of civilization, and at present very few people have reached this level."

"If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have paradise in a few years."

"I would never die for my beliefs because I might be wrong."

"Every man, wherever he goes, is encompassed by a cloud of comforting convictions, which move with him like flies on a summer day."

"MALEFACTOR, n. The chief factor in the progress of the human race."

"Statesmen may plan and speculate for liberty but it is religion and morality alone that can establish the principles upon which freedom can securely stand."

"Toughness doesn't have to come in a pinstriped suit."

"PEDIGREE, n. The known part of the route from an arboreal ancestor with a swim bladder to an urban descendant with a cigarette."

"If I make a record I love, then somebody will like it. Maybe not everybody, but that won't matter."

"The price good men pay for indifference to public affairs is to be ruled by evil men."