Pathological states are the consequence of several determinate factors acting simultaneously...The manifestations of any given agent differ profoundly from one person to another. ...Each noxious agent can express itself by a great variety of different pathological states. ...Different agents can elicit similar reactions. ...The total environment and the (interior medium) constitute a multifactorial system.

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.

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

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

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.

Human life is now molded to a large extent by the changes that man has brought about in his external environment and by his attempts at controlling body and soul.

Social evolution may be the result of intention, but it rarely, if ever, produces the result intended.