Man must feel the earth to know himself and recognize his values... God made life simple. It is man who complicates it.

We are in grave danger of losing forever not just millions of years of evolution on earth, but the eons of change that have produced man and his natural environment.

I owned the world that hour as I rode over it. free of the earth, free of the mountains, free of the clouds, but how inseparably I was bound to them.

The construction of an airplane is simple compared with the evolutionary achievement of a bird. If I had to choose, I would rather have birds than airplanes.

After my death, the molecules of my being will return to the earth and the sky. They came from the stars. I am of the stars.

I’m a simple man without a lot of complicated twists and turns. Look down my throat and you can see out my ass.