Nature always strikes back. It takes all the running we can do to remain in the same place.

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.

Clearly, health and disease cannot be defined merely in terms of anatomical, physiological, or mental attributes. Their real measure is the ability of the individual to function in a manner acceptable to himself and to the group of which he is a part.

In man, at least, satisfaction is commonly followed by boredom.

Nature always strikes back. It takes all the running we can do to remain in the same place.

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