Do not destroy what you cannot create.

A great power imposes the obligation of exercising restraint, and we did not live up to this obligation. I think this affected many of the scientists in a subtle sense, and it diminished their desire to continue to work on the bomb.

Do your work for six years; but in the seventh, go into solitude or among strangers, so that the memory of your friends does not hinder you from being what you have become.

You may assume infinite ignorance and unlimited intelligence.

If you want to succeed in the world, you don't have to be much cleverer than other people. You just have to be one day earlier.

Pronouncement of experts to the effect that something cannot be done has always irritated me.

Do not destroy what you cannot create.