Chemistry begins in the stars. The stars are the source of the chemical elements, which are the building blocks of matter and the core of our subject.

Any argument that asserts that 'God did it' is a sign of a lazy mind.

I regard teaching religion as purveying lies.

The emergence of consciousness, like the unfolding of a leaf, relies upon restraint.

Truth is not arrived at by majority vote.

Science is almost totally incompatible with religion.

My aim is to argue that the universe can come into existence without intervention, and that there is no need to invoke the idea of a Supreme Being in one of its numerous manifestations.

[Religion is] a fantasy [and is] completely empty of any explanatory content. It is also evil.

It is not possible to be intellectually honest and believe in gods. And it is not possible to believe in gods and be a true scientist.

Beauty is a heart with wings.

Your passion sustains you. Your purpose is why you were created. Follow your passion but ensure you fulfill your purpose.

The feeling of friendship is like that of being comfortably filled with roast beef.

Great discoveries and improvements invariably involve the cooperation of many minds.

I have made no money. I am as poor now as ever I was in my life - except in hope, which is by no means bankable.

Things are so hard to figure out when you live from day to day in this feverish and silly world.

That which you know, know not; and that which you see, see not.

Here let me sit in sorrow for mankind.

We're at the crossroads, ... where we need to win to stay alive.

Cruelty is the highest pleasure to the cruel man; it is his love.