"I have gradually come to disbelieve in Christianity as a divine revelation."

"The mystery of the beginning of all things is insoluble by us; and I for one must be content to remain an agnostic."

"I have tried lately to read Shakespeare, and found it so intolerably dull that it nauseated me."

"I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection."

"An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men."