"Right after my father died, I'd come up here a lot. I'd imagine the whole world was one big machine. Machines never come with any extra parts, you know. They always come with the exact amount they need. So I figured, if the entire world was one big machine, I couldn't be an extra part. I had to be here for some reason. And that means you have to be here for some reason, too."
The battle is, in a way, all about finding the reason you are fighting it. You're here for a reason. Keep fighting.