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.

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

But solving problems of disease is not the same thing as creating health and happiness. (...) Health and happiness are the expression of the manner in which the individual responds and adapts to the challenges that he meets in everyday life.

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 very process of living is a continual interplay between the individual and his environment, often taking the form of a struggle resulting in injury or disease.

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