Solitude is painful when one is young, but delightful when one is more mature.

Everything has changed except the way man thinks (when the hydrogen bomb was exploded)

Without the sense of fellowship with men of like mind, of preoccupation with the objective, the eternally unattainable in the field of art and scientific research, life would have seemed to me empty.

Beyond the realms of what we see, into the regions or the unexplored limited only by our imaginations.

Genius is making complex ideas simple, not making simple ideas complex

A finely tempered nature longs to escape from the personal life into the world of objective perception and thought.

Concerning matter, we have been all wrong. What we have called matter is energy, whose vibration has been so lowered as to be perceptible to the senses. There is no matter.