Human diversity makes tolerance more than a virtue; it makes it a requirement for survival.

Eradication of microbial disease is a will-o'-the-wisp; pursuing it leads into a morass of hazy biological concepts and half truths.

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

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.

Whatever his inhibitions and tastes, Western man believes in the natural holiness of seminudism and raw vegetable juice, because these have become for him symbols of unadultered nature.

Man shapes himself through decisions that shape his environment.

In 1946, Oxford University in England was offered large funds to create a new Institute of Human Nutrition. The University refused the funds on the ground that the knowledge of human nutrition was essentially complete, and that the proposed institution would soon run out of meaningful research projects.