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

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.

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

The belief that we can manage the Earth and improve on Nature is probably the ultimate expression of human conceit, but it has deep roots in the past and is almost universal.

Wherever human beings are concerned, trend is not destiny.

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.

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.