Answer: Teaching others is a very ungrateful thing. But I do not think it is ignoble.
It is very noble because by this I bring people closer to their soul. The soul is not in the person. It is a property of bestowal and love that is around us, and we have to attain it. I guide people to such attainment, trying to get them into their soul.
From the Kabbalah Lesson in Russian 9/24/17