To ward off disease or recover health, people as a rule find it easier to depend on healers than to attempt the more difficult task of living wisely.

... each type of civilization has had diseases peculiar to it and at each period the various social groups in any community also have differed in this regard.

The most important pathological effects of pollution are extremely delayed and indirect.

Nature always strikes back. It takes all the running we can do to remain in the same place.

You cannot see the Milky Way in New York City any more ... We risk the loss of our sensual perception. And if you lose those, naturally, you try to compensate by other stimulations, by very loud noises, or by bright lights or drugs.

Men are naturally most impressed by diseases which have obvious manifestations, yet some of their worst enemies creep on them unobtrusively.

Man shapes himself through decisions that shape his environment.