"I am almost convinced (quite contrary to opinion I started with) that species are not (it is like confessing a murder) immutable."

This blog has about 100 Charles Darwin quotes at Charles Darwin quotes and at Some more Charles Darwin quotes.

"Man with all his noble qualities, with sympathy which feels for the most debased, with benevolence which extends not only to other men but to the humblest living creature, with his god-like intellect which has penetrated into the movements and constitution of the solar system- with all these exalted powers- Man still bears in his bodily frame the indelible stamp of his lowly origin."
-- Charles Darwin