There's no question dolphins are smarter than humans as they play more.

I can understand your aversion to the use of the term 'religion' to describe an emotional and psychological attitude which shows itself most clearly in Spinoza... I have not found a better expression than 'religious' for the trust in the rational nature of reality that is, at least to a certain extent, accessible to human reason.

We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know.

Women always worry about things that men forget; men always worry about things women remember.

Science is the century-old endeavor to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible.

The world will not be destroyed by those who do evil, but by those who watch them without doing anything.

If I could do it all again, I'd be a plumber.