Mental Health
The philosopher was really in tricky situation. The most recent apprentice philosopher had shown some promising qualities, however rough and undeveloped, when competing for the position, but was now proving to be more or less a disastrous mess of a human being. To make matters worse, the philosopher's time-tested curriculum was coming up on the unit entitled "Know Thyself", but it was looking more and more ethically justifiable not to subject the apprentice to the pain self-knowledge would inevitably bring.