Epilogue of the Book First on the Moon

Five hundred million years ago, the moon summoned life out of its first home, the sea, and led it onto the empty land. For as it drew the tides across the barren continents of primeval earth, their daily rhythm exposed to sun and air the creatures of the shallows. Most perished—but some adapted to the new and hostile environment. The conquest of the land had begun. We shall never know when this happened, on the shores of what vanished sea. There were no eyes or cameras present to record so obscure, so inconspicuous an event. Now, the moon calls again—and this time life responds with a roar that shakes earth and sky. When the Saturn V soars spaceward on nearly four thousand tons of thrust, it signifi es more than a triumph of technology. It opens the next chapter of evolution. No wonder that the drama of a launch engages our emotions so deeply. The rising rocket appeals to instincts older than reason; the gulf it bridges is not only that between world and world—but the deeper chasm between heart and brain.

— Arthur C. Clarke., L'envoi" from the epilogue of First on the Moon