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

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.

If the misery of the poor be caused not by the laws of nature, but by our institutions, great is our sin.

What a book a devil's chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!

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.

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.

A man who dares to waste one hour of time has not discovered the value of life.

To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.

What a book a devil's chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!