The only source of knowledge is experience

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

The only source of knowledge is experience.

It was the experience of mystery - even if mixed with fear - that engendered religion.

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

In my experience, the best creative work is never done when one is unhappy.