The gravitational-wave background is huge news for the cosmos, yes, but it’s also huge news for you. The nature of reality has not changed—you will not suddenly be able to detect vibrations in your morning coffee that you couldn’t see before. And yet, moments like these can and should change how each of us sees our world. All of a sudden, we know that we are humming in tune with the entire universe, that each of us contains the signature of everything that has ever been. It’s all within us, around us, pushing us to and fro as we hurtle through the cosmos.