Good-humor is a philosophic state of mind; it seems to say to Nature that we take her no more seriously than she takes us. I maintain that one should always talk of philosophy with a smile.

To be fertile in hypotheses is the first perquisite of creativity and to be willing to throw them away the moment experience contradicts them is the next.

The more rational statement is that we feel sorry because we strike, afraid because we tremble, and not that we cry, strike, or tremble because we are sorry, angry, or fearful as the case may be.

Out of time we cut 'days' and 'nights', 'summers' and 'winters.' We say what, each part of the sensible continuum is, and all these abstract whats are concepts. The intelletual life of man consists almost wholly in his substitution of a conceptual order for the persceptual order in which his experience originally comes.

As a rule we disbelieve all the facts and theories for which we have no use.

Asceticism may be a mere expression of organic hardihood, disgusted with too much ease.

In business for yourself, not by yourself.