Nat

“An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.”
― Charles Darwin

“The following proposition seems to me in a high degree probable—namely, that any animal whatever, endowed with well-marked social instincts, the parental and filial affections being here included, would inevitably acquire a moral sense or conscience, as soon as its intellectual powers had become as well, or nearly as well developed, as in man. For, firstly, the social instincts lead an animal to take pleasure in the society of its fellows, to feel a certain amount of sympathy with them, and to perform various services for them.”
― Charles Darwin, The Descent of Man

“What you do speaks so loudly that I cannot hear what you say.”
― Ralph Waldo Emerson

“Ignorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by science.”
― Charles Darwin, The Descent of Man