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

"Ignorance more frequently begets confidence than does knowledge: it is those who know little, and not those who know much, who so positively assert that this or that problem will never be solved by sc…"

"Man in his arrogance thinks himself a great work, worthy of the interposition of a deity. More humble and I believe truer to consider him created from animals."

"It is always best to be a little under rather than over the mark."

"The difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind."