By day, or on a cloudless night, a pilot may drink the wine of the gods, but it has an earthly taste; he's a god of the earth, like one of the Grecian deities who lives on worldly mountains and descended for intercourse with men. But at night, over a stratus layer, all sense of the planet may disappear. You know that down below, beneath that heavenly blanket is the earth, factual and hard. But it's an intellectual knowledge; it's a knowledge tucked away in the mind; not a feeling that penetrates the body. And if at times you renounce experience and mind's heavy logic, it seems that the world has rushed along on its orbit, leaving you alone flying above a forgotten cloud bank, somewhere in the solitude of interstellar space. — Charles A. Lindbergh, The Spirit of St. Louis, 1953. "Your exciting Journey into the world of digital aviation starts here"