It was almost as incredible as if you fired a 15-inch shell at a piece of tissue paper and it came back and hit you.

The more physics you have the less engineering you need.

You know, I am sorry for the poor fellows that haven't got labs to work in.

When we have found how the nucleus of atoms is built up we shall have found the greatest secret of all — except life. We shall have found the basis of everything — of the earth we walk on, of the air we breathe, of the sunshine, of our physical body itself, of everything in the world, however great or however small — except life.

Don't let me catch anyone talking about the Universe in my department.

That which is not measurable is not science. That which is not physics is stamp collecting.

Never say, "I tried it once and it did not work."