Mathematics is the tool specially suited for dealing with abstract concepts of any kind and there is no limit to its power in this field.

The methods of theoretical physics should be applicable to all those branches of thought in which the essential features are expressible with numbers.

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.

The aim of science is to make difficult things understandable in a simpler way; the aim of poetry is to state simple things in an incomprehensible way. The two are incompatible.

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

It is quite clear that beauty does depend on one's culture and upbringing for certain kinds of beauty, pictures, literature, poetry and so on...But mathematical beauty is of a rather different kind. I should say perhaps it is of a completely different kind and transcends these personal factors. It is the same in all countries and at all periods of time.

A physical law must possess mathematical beauty.