It's just the basis of good teaching.

[The optimistic belief that you are raising people to be better humans! And also Necessary. NOT THE FAILED COWBOY RESCUE PLAN THOUGH GIRL HELP. ALSO WHERE'S THE SLEEP IN THIS PLAN. His brow furrows a little. This can probably be seen in his general expression if not in his eyebrows.]

I see... Please find the time to rest when you're able, then. Overworking isn't good for the mind or body, especially in difficult situations.