I cannot conceive of a God who rewards and punishes his creatures, or has a will of the kind that we experience in ourselves. Neither can I nor would I want to conceive of an individual that survives his physical death; let feeble souls, from fear or absurd egoism, cherish such thoughts. I am satisfied with the mystery of the eternity of life and with the awareness and a glimpse of the marvelous structure of the existing world, together with the devoted striving to comprehend a portion, be it ever so tiny, of the Reason that manifests itself in nature.

The value of a man should be seen in what he gives and not in what he is able to receive.

To put it boldly, it is the attempt at a posterior reconstruction of existence by the process of conceptualization.

Playfullness is the essential feature of productive thought.

I want to know the thoughts of God. Everything else is just details.

I don't know what weapons will be used in the Third World War. But I can tell you what they'll use in the Fourth - rocks!

All religions, arts and sciences are branches of the same tree.