All these constructions and the laws connecting them can be arrived at by the principle of looking for the mathematically simplest concepts and the link between them.

The value of a college education is not the learning of many facts but the training of the mind to think

It's not that I'm so smart, it's just that I stay with problems longer.

A knowledge of the existence of something we cannot penetrate, of the manifestations of the profoundest reason and the most radiant beauty - it is this knowledge and this emotion that constitute the truly religious attitude; in this sense, and in this alone, I am a deeply religious man.

Only six men in the world know about relativity. I am not one of them. When I ask them to explain, they confused me.

The place of the expert is on tap not on top.

The thing is, not to stop questioning.