“Whoo, Frisco nights, the end of the continent and the end of doubt, all dull doubt and tomfoolery, good-by”
“I never saw such crazy musicians. Everybody in Frisco blew. It was the end of the continent; they didn't give a damn.”
“If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.”
“Anyone who starts doubting details will end by doubting life itself.”
“Despair is only for those who see the end beyond all doubt.”
“Doubt is the beginning, not the end, of wisdom.”