A world without huge regions of total wilderness would be a cage; a world without lions and tigers and vultures and snakes and elk and bison would be - will be - a human zoo. A high-tech slum.

There's nothing so obscene and depressing as an American Christmas.

Do not burn yourselves out. Be as I am - a reluctant enthusiast... a part-time crusader, a half-hearted fanatic. Save the other half of yourselves and your lives for pleasure and adventure.

The basic science is not physics or mathematics but biology -- the study of life. We must learn to think both logically and bio-logically.

My loyalties will not be bound by national borders, or confined in time by one nation's history, or limited in the spiritual dimension by one language and culture. I pledge my allegiance to the damned human race, and my everlasting love to the green hills of Earth, and my intimations of glory to the singing stars, to the very end of space and time.

Counterpart to the knee-jerk liberal is the new knee-pad conservative, always groveling before the rich and the powerful.

Music clouds the intellect but clarifies the heart.