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

Wherever human beings are concerned, trend is not destiny.

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

Sometimes the more measurable drives out the most important.

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

As far as life is concerned, there is no such thing as "Nature". There are only homes. Home is that environment to which the individual has become adapted; and almost everything is unnatural outside his range of adaptation. Harmonious equilibrium with nature is an abstract concept with a Platonic beauty but lacking the flesh and blood of life. It fails, in particular, to convey the creative emergent quality of human existence.

One may wonder indeed whether the pretense of superior health is not itself rapidly becoming a mental aberration.