If there is a God, he's a great mathematician.

A theory with mathematical beauty is more likely to be correct than an ugly one that fits some experimental data.

The measure of greatness in a scientific idea is the extent to which it stimulates thought and opens up new lines of research.

There are always more people who prefer to speak than to listen.

It is more important to have beauty in one's equations than to have them fit experiment... 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. If there is not complete agreement between the results of one's work and experiment, one should not allow oneself to be too discouraged, because the discrepancy may well be due to minor features that are not properly taken into account and that will get cleared up with further developments of the theory.

Theoretical physicists accept the need for mathematical beauty as an act of faith... For example, the main reason why the theory of relativity is so universally accepted is its mathematical beauty.

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.