The general notions about human understanding...which are illustrated by discoveries in atomic physics are not in the nature of things wholly unfamiliar, wholly unheard of, or new. Even in our own culture, they have a history, and in Buddhist and Hindu thought a more considerable and central place. What we shall find is an exemplification, an encouragement, and a refinement of old wisdom.

I am become death, the destroyer of worlds.

The greatest of the changes that science has brought is the acuity of change; the greatest novelty the extent of novelty.

In a free world, if it is to remain free, we must maintain, with our lives if need be, but surely by our lives, the opportunity for a man to learn anything

Pragmatism is an intellectually safe but ultimately sterile philosophy.

To the confusion of our enemies.

There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago.