Sans sighs, and glances towards the window. He wishes he had something to distract himself with right now, but that's also not really the point. Greg just doesn't really understand what he's saying.

"I already choose to do nothing," he says. It's not in his nature to try to change the world. Psychopomps deal in the aftermath of death, not in saving lives or dishing out justice. "Plenty of times."

Like every time he escorts a soul that he could have saved. It's just not the way of things to intervene, but with heaven away, he's always known deep down that he could.