"In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed."

"It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is most adaptable to change."

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

"If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week."

"We are not here concerned with the first origin of life."