It is my fate to be considered an authority, since I spent my youth rebelling against it.

Time is relative; its only worth depends upon what we do as it is passing.

I assert that the cosmic religious experience is the strongest and the noblest driving force behind scientific research.

You teach me baseball and I'll teach you relativity...No we must not. You will learn about relativity faster than I learn baseball.

The individual who has experienced solitude will not easily become a victim of mass suggestion.

Without the sense of fellowship with men of like mind... life would have seemed to me empty.

Gradually the conviction gained recognition that all knowledge about things is exclusively a working-over of the raw material furnished by the senses. ... Galileo and Hume first upheld this principle with full clarity and decisiveness.