Theoretically antsy

I've always found it very mysterious that when you break a glass, there are pieces on the floor a while, and then they are gone. You keep finding and stepping on little shards you've overlooked. Then suddenly there are no more and you forget it ever happened, even though, you know with the assurance of a cardinal, there's still glass on the floor. There's always just one more tiny piece. You can pick up a long trail of them until the Earth is swallowed up by the Sun. But eventually you don't, and instead you forget, and because you have forgotten, the floor is free of glass, and never bites your foot.