Something valuable went out of the world when the last blank spaces on the map were filled in. The age-old area of myth and fable, which had helped to condition men’s minds ever since men first had minds to develop, shrank to the vanishing point, and an odd constriction of the human spirit seems to have begun. Western man lost his sense of wonder; his world became smaller than it had been, and having no more room for surprises it appeared also to have less room for opportunity.
Perhaps all that had happened was that Western man grew up. Knowing more about the world, he began to realize—as any youth does, when he gets on into full manhood—that most of the infinite possibilities which once beguiled him were simply part of a mirage. Yet growing up is a painful process, even a crippling one. The ultimate horizon turns out to be nearer than had been supposed, and what lies beyond it will be about what lies on this side. The universe hereafter is just a little less stimulating.