Not being too stubborn to recognize when your ideals are flawed, and adapting accordingly. Or perhaps just being able to accept that living a life blindly pursuing an ideal, rather than facility reality, is foolish. [ granted, the ideal he speaks of is fairly simple: saving others no matter what, even at the expense of yourself. ] I suppose that's true enough. Even an idea like healing others can become perverted if the motives behind it are wrong.

[ hm, well, he's already said more than he intended to do. if there's any harm in saying more, he'll deal with the consequences then. ] A Guardian... one who safeguards humanity from itself. But that explanation doesn't make much sense on its own, does it? [ a pause. ] I don't know if it applies to the world you come from, but a Guardian is one chosen by the world to ensure the preservation of mankind. It may seem "noble" on the surface, but in truth it merely means killing the few to save the many. No matter what that might entail.