One is born into a herd of buffaloes and must be glad if one is not trampled under foot before one's time.

A permanent peace cannot be prepared by threats but only by the honest attempt to create a mutual trust. However strong national armaments may be, they do not create military security for any nation nor do they guarantee the maintenance of peace.

Conscious man, to be sure, has at all times been keenly aware that life is an adventure, that life must, forever, be wrested from death.

The truth of a theory is in your mind, not in your eyes.

I used to go away for weeks in a state of confusion.

If you can't explain what you are doing to a nine-year-old, then either you still don't understand it very well, or it's not all that worthwile in the first place.

God is a scientist, not a magician.