Joy of life... depends upon a certain spontaneity in regard to sex. Where sex is repressed, only work remains, and a gospel of work for work's sake never produced any work worth doing.

The key to happiness is accepting one unpleasant reality every day.

A million million years gives us some time to prepare for the end . . . let us make the best of it.

Freedom in general may be defined as the absence of obstacles to the realization of desires.

Civilized people cannot fully satisfy their sexual instinct without love.

Can a society in which thought and technique are scientific persist for a long period, as, for example, ancient Egypt persisted, or does it necessarily contain within itself forces which must bring either decay or explosion?

More cranks take up unfashionable errors than unfashionable truths.