In fighting nature, man can win every battle except the last. If he should win that too, he will perish, like an embryo cutting its own umbilical cord.

In my experience, it is rarer to find a really happy person in a circle of millionaires than among vagabonds.

A civilized nation can have no enemies, and one cannot draw a line across a map, a line that doesn't even exist in nature and say that the ugly enemy lives on the one side, and good friends live on the other.

We are not talking about esthetics. We are talking about life: survival of Man. We must train young people to get another vision of Nature. We call it 'wilderness,' and we think it is progress to get further and further away from it. How crazy! Where would we have been if Nature had not built us up?

Any scientist can testify that a dead ocean means a dead planet .... No national law, no national precautions can save the planet. The ocean, more than any other part of our planet, ... is a classic example of the absolute need for international global action.

It is progress when a centuries-old oak is cut down to give space for a road sign.

But if we begin thinking about the world being over 100 million years old, then it's absolutely by chance that you and I are sitting here alive today, while all the others are dead or have never been born.