The Mekhilta poses a question about the hierarchy of respect: how much honor should a person show to a friend? The answer comes from one of the most revealing moments between Moses and Aaron.
When Aaron addressed Moses after the incident with Miriam's leprosy, he said: "I pray you, my lord" (Numbers 12:11). The words are striking because of who is speaking them. Aaron was not Moses' student. He was Moses' older brother — senior in age, a High Priest in his own right, a prophet who had stood before Pharaoh and performed miracles.
Yet Aaron called Moses "my lord." He spoke to his own brother the way a student speaks to a master. The Mekhilta concludes: Aaron "equated him with his teacher." He deliberately chose to treat his friend and brother with the same deference one owes a rabbi.
From this single exchange, the rabbis derive a sweeping principle: the honor due to one's friend should be as beloved to a person as the fear of his teacher. Friendship does not diminish respect — it should deepen it. Aaron could have pulled rank. He could have spoken as an older brother, as a fellow leader, as a co-equal in prophecy. Instead, he humbled himself completely.
The teaching is aimed at everyone who assumes that closeness breeds informality. The Mekhilta says the opposite is true. The closer the relationship, the more carefully honor must be maintained.