Do not worry about your problems with mathematics, I assure you mine are far greater.

Since the mathematicians have invaded the theory of relativity I do not understand it myself any more.

Pure mathematics is, in its way, the poetry of logical ideas.

Mathematics are well and good but nature keeps dragging us around by the nose.

But there is another reason for the high repute of mathematics: it is mathematics that offers the exact natural sciences a certain measure of security which, without mathematics, they could not attain.

How can it be that mathematics, being after all a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality? Is human reason, then, without experience, merely by taking thought, able to fathom