Charles Darwin — "Man selects only for his own good: Nature only for that of the being which she t…"

"Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows."

"The expression of the emotions in man and animals."

"I feel most deeply that the whole subject is too profound for the human intellect. A dog might as well speculate on the mind of Newton."

"The more civilized so-called Caucasian races have beaten the Turkish hollow in the struggle for existence."

"I have just finished my 'Origin,' and am now going to be a hermit for the rest of my life."