[ This is not what Sherlock expected, and the next note screeches before he catches himself and returns to playing normally. ]

It would.

[ That removes a huge weight off Sherlock's shoulders. He has seen what became of someone close to him, and he has seen what became of Rochester. The combination of the two risks converging on him horrifies Sherlock. He would rather die than inflict that on others. ]

I do not know if I could offer the same in return. I can try. It is not a matter of will but a matter of strength.

[ Just like he may not be able to fight against a god, he doesn't think he could stand against a demon if all the human, with the fragility of their life, is gone. ]

I would try.