Religion and slavery are incompatible.

Technological progress is like an axe in the hands of a pathological criminal.

Focusing your life solely on making a buck shows a certain poverty of ambition. It asks too little of yourself. Because it's only when you hitch your wagon to something larger than yourself that you realize your true potential.

Pleasure in the job puts perfection in the work.

If I had no sense of humor, I would long ago have committed suicide.

I do not believe in immortality of the individual, and I consider ethics to be an exclusively human concern with no superhuman authority behind it.  

A theory must be tempered with reality.

Intellectual growth should commence at birth and cease only at death.

All differences in this world are of degree, and not of kind, because oneness is the secret of everything.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

It is a far, far better thing that I do, than I have ever done; it is a far, far better rest that I go to, than I have ever known.

A rebellion is not a revolution. It may ultimately lead to that end.