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

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

When all thermonuclear sources of energy are exhausted a sufficiently heavy star will collapse. Unless fission due to rotation, the radiation of mass, or the blowing off of mass by radiation, reduce the star's mass to the order of that of the sun, this contraction will continue indefinitely.

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.

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.

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

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