"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."