Be a half-assed crusader, a part-time fanatic. Don't worry to much about the fate of the world. Saving the world is only a hobby. Get out there and enjoy the world, your girlfriend, your boyfriend, husbands wives; climb mountains, run rivers, get drunk, do whatever you want to do while you can, before it's too late.

The sexual revolution transformed the American West: Now even cowboys can get laid.

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.

Readers, not critics, are the people who determine a book's eventual fate.

A society that feels itself too poor to afford the preservation of wilderness is not worthy of the name civilization.

The earth, like the sun, like the air, belongs to everyone - and to no one.

From the point of view of a tapeworm, man was created by God to serve the appetite of the tapeworm.