"If you want to know nature, you have to experience nature, not just the parts of the world you like. You have to hear the cry of the hawk as it dives down to kill a mouse. You have to hear the roar of the tigress when one of her cubs comes up missing. You have to listen to the murmuring of the mountain stream, the hiss of the snake, the death-cry of the prairie dog, the croaking of the frog, the rustle of leaves, the whisper of the wind. You have to hear the voice of the Earth, no matter what form it takes.