Oh, it’s mysterious lamplit evenings, here in the galaxy, one after the other. It’s one of those nights when I wander from window to window, looking for a sign. But I can’t see. Terror and a beauty insoluble are a ribband of blue woven into the fringes of garments of things both great and small. No culture explains, no bivouac offers real haven or rest. But it could be that we are not seeing something. Galileo thought that comets were an optical illusion. This is fertile ground: since we are certain that they’re not, we can look at what scientists are saying with fresh hope. What if there are really gleaming castellated cities hung upside-down over the desert sand? What limpid lakes and cool date palms have our caravans passed untried? Until, one by one, by the blindest of leaps, we light on the road to these places, we must stumble in darkness and hunger.

Annie Dillard, Pilgrim at Tinker Creek