把这一句，留给此刻的你

Behind it all is surely an idea so simple, so beautiful, that when we grasp it - in a decade, a century, or a millennium - we will all say to each other, how could it have been otherwise? How could we have been so stupid?

在这一切的背后，无疑是一个如此简单、如此美丽的理念，以至于当我们把握住它时——十年后、一百年后或一千年后——我们都会彼此说，它怎么会是另一种情况呢?我们怎么会这么蠢?

— John Archibald Wheeler 约翰·阿奇博尔德·惠勒