Everypony has something they're good at. A talent, a calling, etc. Splitting Saber didn't have that, not for a long time. He was just a rich brat for the longest time, so much so that if you saw him in the streets of Canterlot that's what you'd assume he was. He only ever cared about one thing, one thing that was taken from him. Yet, that same night something was given to him, his calling. He just doesn't know it yet. He also doesn't know that his calling is going to change the fate of Equestria itself.