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.

The advantage is that mathematics is a field in which one's blunders tend to show very clearly and can be corrected or erased with a stroke of the pencil.

Any use of a human being in which less is demanded of him and less is attributed to him than his full status is a degradation and a waste.

There are no answers, only cross references.

Any useful logic must concern itself with Ideas with a fringe of vagueness and a Truth that is a matter of degree.

The world of the future will be an even more demanding struggle against the limitations of our intelligence, not a comfortable hammock in which we can lie down to be waited upon by our robot slaves.

The simplest type of breakdown exhibits itself as an oscillation in a goal-seeking process which appears only when that process is actively invoked.