The modern physicist is a quantum theorist on Monday, Wednesday, and Friday, and a student of gravitational relativity on Tuesday, Thursday, and Saturday. On Sunday, he is praying... that someone will find the reconciliation between the two views.

If the human being is condemned and restricted to perform the same functions over and over again, he will not even be a good ant, not to mention a good human being.

It is easy to make a simple machine which will run toward the light or run away from it, and if such machines also contain lights of their own, a number of them together will show complicated forms of social behavior.

Any labor which competes with slave labor must accept the economic conditions of slave labor.

The best material model of a cat is another, or preferably the same, cat.

What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.

Progress imposes not only new possibilities for the future but new restrictions.