Moses' descent from Mount Sinai marked a profound shift in his leadership, accompanied by a miraculous physical transformation. A divine light radiated from his face, establishing a pattern of interaction between him, God, and the people that lasted until his final day [אבן עזרא]. The radiance beamed outward like the rays of the morning star [הדר זקנים], restoring to Moses the pristine spiritual state of the first man [אור החיים]. More than just a physical marvel, this divine glow served a crucial purpose. It proved to the Israelites that Moses was their true and exclusive leader, a necessary reassurance after they had recently faltered and sought a replacement [הדר זקנים]. The people needed to look at him repeatedly to realize that this light was permanent and would not fade over time [אור החיים]. Even with this intense illumination, his features remained clear and easily recognizable [מלבי״ם].
When delivering God's message and teaching the Torah, Moses deliberately stood without a veil. This ensured that the divine majesty accompanied the teachings. Gazing at his radiant face brought the people immense joy and comfort, much like the pleasant warmth of the sun [העמק דבר, ביאור שטיינזלץ]. Although staring directly at a leader of his stature might typically be considered dangerous, doing so during the study of the Torah caused no harm. In fact, it was God's will that the Israelites look directly at the living light shining from him during these sacred moments [אור החיים, העמק דבר].
Once Moses finished addressing the nation and returned to his daily routine, he would cover his face [שד״ל, ביאור יש״ר]. Commentators offer two primary reasons for this practice. First, it ensured that the holy and awesome light was not used for ordinary, everyday matters [מלבי״ם, ביאור שטיינזלץ]. Second, the veil acted as a barrier from the outside world, allowing Moses to remain deep in thought and constantly connected to God without distraction [העמק דבר].
Whenever Moses entered the Tent of Meeting to speak with God and receive further instruction, he would remove the veil [רשב״ם, רש״י, ביאור יש״ר, העמק דבר]. During these intimate encounters, it is simply noted that Moses went in to speak with Him, intentionally leaving out God's explicit name. This highlights the unparalleled closeness between God and His prophet. They communicated directly and without fear, like close friends, elevating Moses above all other prophets [רבנו בחיי]. This exceptional spiritual standing is further reflected by the fact that Moses and his radiant face are highlighted three distinct times in this context. These three instances correspond to his three separate forty-day ascents of Mount Sinai, with each journey granting him greater spiritual understanding and an even brighter divine light [רבנו בחיי].