I began working with the John Muir Institute and then started helping found Friends of the Earth organizations here and there in other countries. That pretty well brings us up to the present.

Keep your rivers flowing as they will, and you will continue to know the most important of all freedoms-the boundless scope of the human mind to contemplate wonders, and to begin to understand their meaning.

While the death of young men in war is unfortunate, it is no more serious than the touching of mountains and wilderness areas by humankind.

There are many ways to salvation, and one of them is to follow a river.

People have alleged that I have inspired many young people over the years, but I say, it was just the opposite.

I'm always impressed with what young people can do before older people tell them it's impossible

Understanding how DNA transmits all it knows about cancer, physics, dreaming and love will keep man searching for some time.