Conscience reigns but it does not govern.

A man is a poet if difficulties inherent in his art provide him with ideas; he is not a poet if they deprive him of ideas.

Sometime I think; and sometime I am.

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.

The folly of mistaking oneself for an oracle is built right into us.

There is a difference if we see something with a pencil in our hand or without one.

Every social system is more or less against nature, and at every moment nature is at work to reclaim her rights.