The novelties of one generation are only the resuscitated fashions of the generation before last.

What is wrong with priests and popes is that instead of being apostles and saints, they are nothing but empirics who say I know instead of I am learning, and pray for credulity and inertia as wise men pray for skepticism and activity.

Property, said Proudhon, is theft. This is the only perfect truism that has been uttered on the subject.

Now that we have learned to fly the air like birds, swim under water like fish, we lack one thing - to learn to live on earth as human beings.

All evolution in thought and conduct must at first appear as heresy and misconduct.

The hand of the painter is incurably mechanical: his technique is incurably artificial... The camera... is so utterly unmechanical.

Experience is a wonderful thing. It enables you to recognize a mistake when you make it again. If all economists were laid end to end they would not reach a conclusion.