The true measure of a man is the degree to which he has managed to subjugate his ego.

An evening everyone agrees, is a lost evening.

There does, in fact, appear to be a plan.

The content of scientific theory itself offers no moral foundation for the personal conduct of life.

As to science, we may well define it for our purpose as "methodical thinking directed toward finding regulative connections between our sensual experiences".

The scientist finds his reward in what Henri Poincare calls the joy of comprehension, and not in the possibility of application to which any discovery may lead.

I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.