“Has joy any survival value in the operations of evolution? I suspect that it does; I suspect that the morose and fearful are doomed to quick extinction. Where there is no joy there can be no courage; and without courage all other virtues are useless. Therefore the frogs, the toads, keep on singing even though we know, if they don't, that the sound of their uproar must surely be luring all the snakes and ringtail cats and kit foxes and coyotes and great horned owls toward the scene of their happiness.”

“You can't study the darkness by flooding it with light.”

“To the question: Wilderness, who needs it? Doc would say: Because we like the taste of freedom, comrades. Because we like the smell of danger. But, thought Hayduke, what about the smell of fear, Dad?”

“One man alone can be pretty dumb sometimes, but for real bona fide stupidity, there ain't nothin' can beat teamwork.”

“Love implies anger. The man who is angered by nothing cares about nothing.”

“There is science, logic, reason; there is thought verified by experience. And then there is California.”

“Wilderness is not a luxury but a necessity of the human spirit.”

“For myself I hold no preferences among flowers, so long as they are wild, free, spontaneous. Bricks to all greenhouses! Black thumb and cutworm to the potted plant!”

“May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view. May your mountains rise into and above the clouds.”

“Belief in the supernatural reflects a failure of the imagination.”

“Growth for the sake of growth is the ideology of the cancer cell.”