"Those great efforts of intellect, upon which the mind sometimes touches, are such that it cannot maintain itself there. It only leaps to them, not as upon a throne, forever, but merely for an instant."

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We are the most dangerous species of life on the planet, and every other species, even the earth itself, has cause to fear our power to exterminate. But we are also the only species which, when it chooses to do so, will go to great effort to save what it might destroy.

— Wallace Stegner