[Ah, how... quaint. It reminds him of Sakamoto. They had similar thoughts, this— idea that the entire world couldn't possibly be as awful as it might seem.]

Once some things are lost, they can't be replaced. The thing that I want... it's not something that can be fixed, or something that can be gained, no matter where I go. Now that it's gone, it's gone for good.

[He wasn't unrealistic about it—he absolutely realized that nothing would bring him back, and maybe he realized that nothing would ever really be enough to ease his heart, either. But at the same time... He just couldn't accept a world that wouldn't allow his sensei, perhaps the only beautiful existence he'd ever really known, to live.]

What do you do when you lose something like that?