What is love? the desert asked.
And the boy answered, "Love is the falcon's flight over your sands. Because for him, you are a green field from which he always returns with game. He knows your rocks, your dunes, and your mountains, and you are generous to him."
"The falcon's beak carries bits of me, myself," the desert said. "For years I care for his game, for the little waterthat I have, and then I show him where the game is. And, one day, as I enjoy the fact that his game thrives on my surface, the falcon dives out of the sky, and takes away what I've created."
"But that's why you created the game in the first place," the boy answered. "To nourish the falcon. And the falcon then nourishes man. And, eventually, man will nourish your sands, where the game will once again flourish. That's how the world goes."
So is that what love is?
"Yes, that's what love is. It's what makes the game become the falcon, the falcon become the man, and man, in his turn, become the desert. It's what turns lead into gold, and makes the gold return to the earth."
"I don't understand what you're talking about," the desert said.
"But you can at least understand that somewhere in your sands there is a woman waiting for me. And that's why I have to turn myself into the wind."
(one of favorite part of The Alchemist, by paulo coelho)