I am become death, the destroyer of worlds.

But when you come right down to it the reason that we did this job is because it was an organic necessity. If you are a scientist you cannot stop such a thing. If you are a scientist you believe that it is good to find out how the world works; that it is good to find out what the realities are; that it is good to turn over to mankind at large the greatest possible power to control the world and to deal with it according to its lights and values.

If we must live with a perpetual sense that the world and the men in it are greater than we and too much for us, let it be the measure of our virtue that we know this and seek no comfort.

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.

Sometimes the answer to fear does not lie in trying to explain away the causes, sometimes the answer lies in courage.

Science is not everything, but science is very beautiful.

The history of science is rich in example of the fruitfulness of bringing two sets of techniques, two sets of ideas, developed in separate contexts for the pursuit of new truth, into touch with one another.