Hagane no renkinjutsushi2003

Alphonse Elric:
In order to gain something, you must present something of equal value. That is the principle of Equivalent Trade. Back then, we had believed it to be the truth of the world. But as it turns out, the world is an imperfect place, and there is no principle that can explain its existence. Not even the principle of Equivalent Trade. But we still believe that one cannot gain something without paying the price. The pain we endured must have been the price for something else. We also believe that by paying the price of hard work, we can gain something. Equivalent Trade is not a principle of the world.