Nature is all that we think we know plus all that we don't know whether or not we know that we don't know it.

Racism, pollution and the rest of it are themselves very close to extinction.

By the time you are 88 years old, you "have consumed 300 tons of food, air and water."

God is the great comprehensive a priori integrity of Universe within which human beings find themselves to be operating.

Every time man makes a new experiment he always learns more. He cannot learn less.

Our little Spaceship Earth is only eight thousand miles in diameter, which is almost a negligible dimension in the great vastness of space.

If you are the master be sometimes blind, if you are the servant be sometimes deaf.