In my Department at the University of South Florida, we talk about how teaching is performance. You prepare, learn your lines and then perform teacher. Afterwards you go home and perform spouse, parent, child, etc.
We are many people. I think that being able to share knowledge with others is a great gift. The challenge is people who have taken up teaching because they are smart but are not good at communicating or performing.
They make for some dull courses.
Thoughts...... Doug