I understand and sympathize with the reasonable needs of a reasonable number of people on a finite continent. All life depends upon other life. But what is happening today, in North America, is not rational use but irrational massacre. Man the Pest, multiplied to the swarming stage, is attacking the remaining forests like a plague of locusts on a field of grain.

Man's deliberate destruction of his own habitat -- planet Earth -- could serve as a mighty theme for a mighty book worthy of a modern Melville or Tolstoy. But our best fictioneers confine themselves to domestic drama -- soap opera with literary trimmings.

The axiom of conditioned repetition, like the binomial theorem, is nothing but a piece of insolence.

Has joy any survival value in the operations of evolution? I suspect that it does; I suspect that the morose and fearful are doomed to quick extinction. Where there is no joy there can be no courage; and without courage all other virtues are useless.

The moral duty of the free writer is to begin his work at home: to be a critic of his own community, his own country, his own government, his own culture. The more freedom the writer possesses, the greater the moral obligation to play the role of critic.

Pure science is a myth: Both mathematical theoreticians like Albert Einstein and practical crackpots like Henry Ford dealt with different aspects of the same world.

Our big social institutions do not reflect human nature; they distort it.