The Homunculi may have started the war, but we were the ones who carried it out.

The two brothers who sought to get their only family back, to feel her warmth, one lost his last family member and the other could never feel warmth again. The one who wanted her baby back lost chance of having one again, And the one who had a vision to see his country change became blind.

Fool! Nothing but black ink runs through my veins!

Your hands weren't meant to take peoples lives. They were meant to save them.

There's no such thing as a painless lesson. They just don't exist. Sacrifices are necessary. You can't gain anything without losing something first although if you can endure that pain and walk away from it, you'll find that you now have a heart strong enough to overcome any obstacle. Yeah, a heart made fullmetal.

Hughes: (Talking for Mustang) 'I won't allow you to die under my jurisdiction because it'd be a pain to clean up the mess.' That's what he said. Edward: Fine. Tell him, 'Understood. I'll never die before you, colonel, you @#'$ idiot.' Hughes: Ha ha ha! They say the ruder you are, the luckier you are! In that case, you and Roy are gonna live forever!

Teachings that do not speak of pain have no meaning...because humankind cannot gain anything without first giving something in return.