When I watch species other than my own, their instinct's wisdom is what most impresses and disturbs me.

The essence of life, I concluded, did not lie in the material. It penetrated, but was not bound to, the physical world of science.

What makes human power erupt like a volcano? What destroy's it? The civilizations of Rome, Greece, Egypt, China were all eruptions from a human core.

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

If I had to choose, I would rather have birds than airplanes.

At the end of the first half-century of engine-driven flight, we are confronted with the stark fact that the historical significance of aircraft has been primarily military and destructive.

I have seen the science I worshiped, and the aircraft I loved, destroying the civilization I expected them to serve.