It seems that if one is working from the point of view of getting beauty in one's equations, and if one has really a sound insight, one is on a sure line of progress.

God used beautiful mathematics in creating the world.

I admired Bohr very much. We had long talks together, long talks in which Bohr did practically all the talking.

The shortage of buyers, which the world is suffering from, is readily understood, not as due to people not wishing to obtain possession of goods, but as people being unwilling to part with something which might earn a regular income in exchange for those goods.

I do not see how a man can work on the frontiers of physics and write poetry at the same time. They are in opposition.

Renormalization is just a stop-gap procedure. There must be some fundamental change in our ideas, probably a change just as fundamental as the passage from Bohr's orbit theory to quantum mechanics. When you get a number turning out to be infinite which ought to be finite, you should admit that there is something wrong with your equations, and not hope that you can get a good theory just by doctoring up that number.

A book on the new physics, if not purely descriptive of experimental work, must essentially be mathematical.