Man not only survives and functions in his environment, he shapes it and he is shaped by it.

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.

Man shapes himself through decisions that shape his environment.

Each civilization has its own kind of pestilence and can control it only by reforming itself.

Human life implies adventure, and there is no adventure without struggles and dangers.

The mechanisms of vis medicatrix naturæ—the most healing power of nature—are so effective that most diseases are self-terminating.

...Search for the cause may be a hopeless pursuit because most disease states are the indirect outcome of a constellation of circumstances.