A man's true secrets are more secret to himself than they are to others.

An attitude of permanent indignation signifies great mental poverty. Politics compels it votaries to take that line and you can see their minds growing more impoverished every day, from one burst of righteous indignation to the next.

Just as water, gas, and electricity are brought into our houses from far off to satisfy our needs in response to a minimal effort, so we shall be supplied with visual or auditory images, which will appear and disappear at a simple movement of the hand, hardly more than a sign.

One had to be a Newton to notice that the moon is falling, when everyone sees that it doesn't fall.

Serious people have few ideas. People with ideas are never serious.

The world acquires value only through its extremes and endures only through moderation; extremists make the world great, the moderates give it stability.

No work of art is ever completed, it is only abandoned.