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

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

It is a disturbing fact that Western civilization, which claims to have achieved the highest standard of health in history, finds itself compelled to spend ever-increasing sums for the control of disease.

... 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.

There is an unbroken continuum from the wisdom of the body to the wisdom of the mind, from the wisdom of the individual to the wisdom of the race.

It is possible to analyze the biological and social influences that make each human being unique, unprecedented, and unrepeatable, but this analysis does not explain how and why each feels different from all other human beings.

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.