The more we get out of the world the less we leave, and in the long run we shall have to pay our debts at a time that may be very inconvenient for our own survival.

The idea that information can be stored in a changing world without an overwhelming depreciation of its value is false. It is scarcely less false than the more plausible claim that after a war we may take our existing weapons, fill their barrels with information.

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

To live effectively is to live with adequate information.

The nervous system and the automatic machine are fundamentally alike in that they are devices, which make decisions on the basis of decisions they made in the past.

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