The difference between psychiatrists and other mentally disturbed people is something like the relationship between concave and convex madness.

I can say with pride that I have spent days and nights not reading anything, and that with unflagging energy I use every moment toacquire gradually an encyclopedic lack of education.

Family life is an encroachment on private life.

To me it's still a greater miracle when a fly flies than when a human being undertakes to do so.

I am already so popular that anyone who vilifies me becomes more popular than I am.

The development of technology will leave only one problem: the infirmity of human nature.

Progress celebrates victories over nature. Progress makes purses out of human skin. When people were traveling in mail coaches, the world got ahead better than it does now that salesmen fly through the air. What good is speed if the brain has oozed out on the way? How will the heirs of this age be taught the most basic motions that are necessary to activate the most complicated machines? Nature can rely on progress; it will avenge it for the outrage it has perpetrated on it.