I consider Christianity to be one of the great disasters of the human race... It would be impossible to imagine anything more un - Christianlike than theology.

Nobody has a right to speak more clearly than he thinks.

The guiding motto in the life of every natural philosopher should be, seek simplicity and distrust it.

The future belongs to those who can rise above the confines of the earth.

The many become one and are increased by one.

Peace is self-control at its widest-at the width where the "self" has been lost, and interest has been transferred to coordinations wider than personality.

A race preserves its vigor so long as it harbors a real contrast between what has been and what may be; and so long as it is nerved by the vigor to adventure beyond the safeties of the past. Without adventure civilization is in full decay.