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

“The love of wilderness is more than a hunger for what is always beyong reach; it is also an expression of loyalty to the earth, the earth which bore us and sustains us, the only paradise we shall e...”

“Water, water, water....There is no shortage of water in the desert but exactly the right amount , a perfect ratio of water to rock, water to sand, insuring that wide free open, generous spacing amo...”

“What is the purpose of the giant sequoia tree? The purpose of the giant sequoia tree is to provide shade for the tiny titmouse.”

“If a man's imagination were not so weak, so easily tired, if his capacity for wonder not so limited, he would abandon forever such fantasies of the supernal. He would learn to perceive in water, le...”

“The weather here is windy, balmy, sometimes wet. Desert springtime, with flowers popping up all over the place, trees leafing out, streams gushing down from the mountains. Great time of year for hi...”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”