D'var Torah: The practice of common courtesy is a prerequisite to the study and fulfillment of Torah. Moshe Rabenu supervised the intricate task of building the Mishkan, according to the exact details revealed to him by HaShem. On the day that the Mishkan was completed, the Shechinah -- the holy presence of HaShem -- filled the Mishkan. Nevertheless, Moshe did not assume that he had a right to enter the Mishkan until HaShem gave him permission to do so. If Moshe had entered without permission, his nobel status would have been greatly diminished. He displayed fine virtue of character by patiently waiting until HaShem summoned him, "And HaShem called to Moshe." (Vayikra 1:1)
Moral: Common courtesy is founded upon the integration of wisdom, sensitivity, and respectfulness of others. It transforms us to be a fitting vessel for Torah, Mitzvot, and closeness to HaShem.
Application: Accustom yourself to be uncompromisingly courteous, polite, and caring towards all other people, at all times. Refine your character and become an authentic and pure personification of Torah.
(Based on Rashi and Da'as Torah of Rav Yerucham of Mir)