'It worked.' (said after witnessing the first atomic detonation).

The physicists have known sin; and this is a knowledge which they cannot lose.

Both the man of science and the man of action live always at the edge of mystery, surrounded by it.

I am become death, the destroyer of worlds.

To try to be happy is to try to build a machine with no other specification than that it shall run noiselessly.

We know that the wages of secrecy are corruption. We know that in secrecy error, undetected, will flourish and subvert.

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.