Charles Darwin
A man who dares to waste one hour of time has not discovered the value of life.
An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.
We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act.
False facts are highly injurious to the progress of science, for they often endure long; but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness.
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 science.
It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.
Man is descended from a hairy, tailed quadruped, probably arboreal in its habits.