The oldest living Immortal at the time. And suddenly he changed. He turned his back on war. When you kill, it haunts you for the rest of your life. You know, you might even find a reason not to fight.
Some people are evil.
It's up to people who can stop it to do so. When you stop feeling and you stop hurting, that's when you're dead inside. And that, my friend, is when I'll worry about you. Now a Scotsman's weapon, that's another matter. Once it gets going there's nothing that can stop it.