"Saleen, I'm about to impart a secret art to you. If you were to master it..."
Saleen looked at his teacher. Jason had never been so serious and solemn when he was about to teach him something.
Jason continued, "If you were to master it, you shall do your best to keep this deep within your heart and not impart it to anyone else."
Saleen was dumbfounded for a bit and did not ask questions. There were many secret arts to the world of mages, as well as many rules. Teachers were not allowed to pass them on to their students.
All mages within the temple excused themselves. No outsider was allowed to stand around and watch while the imparting of secret arts was being carried out.