J. Robert Oppenheimer

In some sort of crude sense which no vulgarity no humor no overstatement can quite extinguish the physicists have known sin and this is a knowledge which they cannot lose.

If atomic bombs are to be added as new weapons to the arsenals of a warring world, or to the arsenals of nations preparing for war, then the time will come when mankind will curse the names of Los Alamos and of Hiroshima.

In the spring of 1936, I was introduced by friends to Jean Tatlock. In the autumn, I began to court her. We were at least twice close enough to marriage to think of ourselves as engaged.

In some sort of crude sense, which no vulgarity, no humor, no overstatement can quite extinguish, the physicists have known sin; and this is a knowledge which they cannot lose.

It is a profound and necessary truth that the deep things in science are not found because they are useful: they are found because it was possible to find them.

The atomic bomb made the prospect of future war unendurable. It has led us up those last few steps to the mountain pass; and beyond there is a different country.

There must be no barriers to freedom of inquiry. There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors.

My mother was born in Baltimore, and before her marriage, she was an artist and teacher of art.

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

It is a profound and necessary truth that the deep things in science are not found because they are useful; they were found because it was possible to find them.

My life as a child did not prepare me for the fact that the world is full of cruel and bitter things.

Access to the Vedas is the greatest privilege this century may claim over all previous centuries.

Scientists are not delinquents. Our work has changed the conditions in which men live, but the use made of these changes is the problem of governments, not of scientists.

The peoples of this world must unite or they will perish.

The powerful notion of entropy which comes from a very special branch of physics is certainly useful in the study of communication and quite helpful when applied in the theory of language.

I am become death, the destroyer of worlds.

No man should escape our universities without knowing how little he knows.

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.

To recruit staff, I traveled all over the country talking with people who had been working on one or another aspect of the atomic-energy enterprise and people in radar work, for example, and underwater sound, telling them about the job, the place that we are going to, and enlisting their enthusiasm.

Any man whose errors take ten years to correct is quite a man.

When you see something that is technically sweet, you go ahead and do it and you argue about what to do about it only after you have had your technical success. That is the way it was with the atomic bomb.

In the material sciences these are and have been, and are most surely likely to continue to be heroic days.

The foolish man seeks happiness in the distance the wise grows it under his feet.

Science is not everything, but science is very beautiful.

My childhood did not prepare me for the fact that the world is full of cruel and bitter things.

I saw what the Depression was doing to my students. Often they could get no jobs, or jobs which were wholly inadequate. And through them, I began to understand how deeply political and economic events could affect men's lives. I began to feel the need to participate more fully in the life of the community.

The optimist thinks this is the best of all possible worlds. The pessimist fears it is true.

I never accepted Communist dogma or theory.

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

I had had a continuing smoldering fury about the treatment of Jews in Germany.