We spend more time working for our labor-saving machines than they do working for us.
We live in the kind of world where courage is the most essential of virtues; without courage, the other virtues are useless.
What is truth? I don't know and I'm sorry I brought it up.
A giant thirst is a great joy when quenched in time.
There has never yet been a human society worthy of the name of civilization. Civilization remains a remote ideal.
Wilderness begins in the human mind.