The high destiny of the individual is to serve rather than to rule.

It is my conviction that pure mathematical construction enables us to discover the concepts and the laws connecting them, which gives us the key to the understanding of nature ... In a certain sense, therefore, I hold it true that pure thought can grasp reality, as the ancients dreamed.

Cherish the questions, for the answers keep changing.

This has been done elegantly by Minkowski; but chalk is cheaper than grey matter, and we will do it as it comes.

He who joyfully marches to music in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would suffice.

Time does not exist - we invented it

It is just as important to make knowledge live and keep it alive as to solve specific problems.