The opposition of instinct and reason is mainly illusory. Instinct, intuition, or insight is what first leads to the beliefs which subsequent reason confirms or confutes; but the confirmation, where it is possible, consists, in the last analysis, of agreement with other beliefs no less instinctive. Reason is a harmonizing, controlling force rather than a creative one. Even in the most purely logical realms, it is insight that first arrives at what is new.

The law of causality, I believe, like much that passes muster among philosophers, is a relic of a bygone age, surviving, like the monarchy, only because it is erroneously supposed to do no harm.

Even in the most purely logical realms, it is insight that first arrives at what is new.

The key to happiness is accepting one unpleasant reality every day.

One of the most painful circumstances of recent advances in science is that each one makes us know less than we thought we did

I do not pretend to start with precise questions. I do not think you can start with anything precise. You have to achieve such precision as you can, as you go along.

It is a waste of energy to be angry with a man who behaves badly, just as it is to be angry with a car that won't go.