The Blessing of a Pleasant Teacher
When a person teaches Torah, the merit of his Torah awakens blessings to flow into the world. However, if he assumes arrogance over his students, the blessings are repelled from entering the world.
Lesson: When we teach Torah with humility and love, the blessings of HaShem pour into the world.
App: Be pleasant and patient with your students and teach according to their ability to receive the knowledge --- and bring the blessings of HaShem into the world.
[Based on Tomer Devorah of Rav Moshe Corevaro, Chapter Seven]