Incompetence is the true crisis.

It is not by sitting still at a grand distance and calling the human race larvae that men are to be helped.

Make everything as simple as possible, but not simpler.

The concept of marriage must have been thought up by an unimaginative pig.

No fairer destiny could be allotted to any physical theory than that it should of itself point out the way to the introduction of a more comprehensive theory, in which it lives on as a limiting case.

Human beings are not condemned, because of their biological constitution, to annihilate each other or to be at the mercy of a cruel, self-inflicted fate.

There is nothing divine about morality, it is a purely human affair.