... 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.

With reference to life there is not one nature; there are only associations of states and circumstances, varying from place to place and from time to time.

It is not man the ecological crisis threatens to destroy but the quality of human life.

Sometimes the more measurable drives out the most important.

Life is short, the art is long, the problems pressing.

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.