It's a sort of curious phenomenon that God is somehow not quite as nice as the devil; the devil doesn't punish you for behaving well, but God punishes you for behaving badly.

The great poem and the deep theorem are new to every reader, and yet are his own experiences, because he himself recreates them.

Power is the by-product of understanding.

Nations in their great ages have not been great in art or science, but in art and science.

Fifty years from now if an understanding of man's origins, his evolution, his history, his progress is not in the common place of the school books we shall not exist.

There is no absolute knowledge. And those who claim it, whether they are scientists or dogmatists, open the door to tragedy.

Dream or nightmare, we have to live our experience as it is, and we have to live it awake. We live in a world which is penetrated through and through by science and which is both whole and real. We cannot turn it into a game simple by taking sides.