What, exactly, is the happiness that can be earned by turning away from reality?
There's no such thing as being cowardly in a fight. ~Edward Elric
A king is no king without his people, but a people without their king would be lost as well.
Humankind cannot gain something without first giving something in return. To obtain, something of equal value must be lost. This is Alchemy's First Law of Equivalent Exchange. In those days, we really believed that to be the world's one, and only, truth.
I want you by my side. Forever. (Full Metal Alchemist)
So that the new generation that will be born can enjoy happiness. To pay the cost we will have to shoulder corpses and cross a river of blood (Riza Hawkeye -- Fullmetal Alchemist)