Human diversity makes tolerance more than a virtue; it makes it a requirement for survival. Celebrations of Life, 1981

It was teeming with a diversity of life, with mussels, tubeworms, fish and crabs. Struggles for survival were playing out before our eyes. The incredible multitude of crabs in combat with each other for existence is an image I will never forget.

Man shapes himself through decision that shape his environment.

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

More can be learned from what works than from what fails.

Never judge someone
By the way he looks
Or a book by the way it's covered;
For inside those tattered pages,
There's a lot to be discovered