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.

You may assume infinite ignorance and unlimited intelligence.

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.

A scientist's aim in a discussion with his colleagues is not to persuade, but to clarify.

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.

Those individuals who give moral considerations a much greater weight than considerations of expediency represent a comparatively small minority, five percent of the people perhaps. But, In spite of their numerical inferiority, they play a major role in our society because theirs is the voice of the conscience of society.

If the thickness is larger than the critical value I can produce an explosion.