Time is an abstraction which, on earth, exists only for the human brain it has evolved.

Why does one want to walk wings? Why force one's body from a plane to make a parachute jump? Why should man want to fly at all? People often ask these questions. But what civilization was not founded on adventure, and how long could one exist without it? Some answer the attainment of knowledge. Some say wealth, or power, is sufficient cause. I believe the risks I take are justified y the sheer love of the life I lead.

I know there is infinity beyond ourselves. I wonder if there is infinity within.

No right of preference exists in favor of person, property, or business. Personal claims and ambitions must yield in favor of whatever best serves the general welfare.

The improvement of our way of life is more important than the spreading of it. If we make it satisfactory enough, it will spread automatically. If we do not, no strength of arms can permanently oppose it.

And if at times you renounce experience and mind's heavy logic, it seems that the world has rushed along on its orbit, leaving you alone flying above a forgotten cloud bank, somewhere in the solitude of interstellar space.

If I were entering adulthood now instead of in the environment of fifty years ago, I would choose a career that kept me in touch with nature more than science. ... Too few natural areas remain; both by intent and by indifference we have insulated ourselves from the wilderness that produced us.