"But the world isn't perfect, and the law is incomplete. Equivalent Exchange doesn't encompass everything that goes on here. But I still choose to believe in its principle: that all things do come at a price. That there's an ebb, and a flow, a cycle. That the pain we went through did have a reward and that anyone who's determined and perseveres will get something of value in return, even if it's not what they expected. I don't think of Equivalent Exchange as a law of the world anymore. I think of it as a promise between my brother and me."
Alphonse Elric, Fullmetal Alchemist
