Teachers are usually optimists, I think. The idea that your students will someday be excellent [although now, they are little snots] is part of the appeal of any kind of teaching or coaching. It’s sort of an abstract benefit, since teachers rarely get any credit for what they do, but still, it’s great to find out that someone you taught or trained is now hugely successful at the thing you helped them learn.
I don’t think I have heard that version, actually. What’s the rest?