People accept a representation in which the elements of wish and fantasy are purposely included but which nevertheless proclaims to represent "the past" and to serve as a guide-rule for life, thereby hopelessly confusing the spheres of knowledge and will.

A new culture can only grow up in the soil of a purged humanity.

We have to transpose ourselves into this impressionability of mind, into this sensitivity to tears and spiritual repentance, intothis susceptibility, before we can judge how colorful and intensive life was then.

The new knowledge has not yet settled in culture. It has not yet been integrated in a new cosmic conception.

Play is a uniquely adaptive act, not subordinate to some other adaptive act, but with a special function of its own in human experience.

Revolution as an ideal concept always preserves the essential content of the original thought: sudden and lasting betterment.

You only live a short time... and you are dead a long time.