Leading with Love and Faith: From the High Priest to Lubavitch

(12) Hillel and Shammai received [the oral tradition] from them. Hillel used to say: be of the disciples of Aaron, loving peace and pursuing peace, loving mankind and drawing them close to the Torah.

"Be of the disciples of Aharon, loving peace and pursuing peace": They explained in Avot DeRabbi Natan how Aharon loved peace: When he would see two people quarreling, he would go to each one of them without the knowledge of his fellow and say to him, “Behold how your fellow is regretting and afflicting himself that he sinned against you; and he told me that I should come to you so that you will forgive him. And as a result of this, when they bumped into each other, they would kiss each other. And how would he bring people closer to the Torah? When he would know about someone that he committed a sin, he would befriend him and show him a friendly demeanor; and that man would be embarrassed and say [to himself], “If that righteous man would know my evil deeds, how much would he distance himself from me? And as a result of this, [that man] would change for the better. And this is what the prophet testifies about [Aharon] (Malachi 2), “In peace and in straightness did he walk with Me and he brought back many from sinning."

(7) Moses was a hundred and twenty years old when he died; his eyes were undimmed and his vigor unabated. (8) And the Israelites bewailed Moses in the steppes of Moab for thirty days. The period of wailing and mourning for Moses came to an end.

(23) At Mount Hor, on the boundary of the land of Edom, the LORD said to Moses and Aaron, (24) “Let Aaron be gathered to his kin: he is not to enter the land that I have assigned to the Israelite people, because you disobeyed my command about the waters of Meribah. (25) Take Aaron and his son Eleazar and bring them up on Mount Hor. (26) Strip Aaron of his vestments and put them on his son Eleazar. There Aaron shall be gathered unto the dead.” (27) Moses did as the LORD had commanded. They ascended Mount Hor in the sight of the whole community. (28) Moses stripped Aaron of his vestments and put them on his son Eleazar, and Aaron died there on the summit of the mountain. When Moses and Eleazar came down from the mountain, (29) the whole community knew that Aaron had breathed his last. All the house of Israel bewailed Aaron thirty days.

As it is taught: During the year in which Shimon HaTzaddik died, he said to his associates: This year, he will die, euphemistically referring to himself. They said to him: From where do you know? Shimon HaTzaddik said to them: In previous years, every Yom Kippur, upon entering the Holy of Holies, I had a prophetic vision in which I would be met by an old man who was dressed in white, and his head was wrapped in white, and he would enter the Holy of Holies with me, and he would leave with me. But this year, I was met by an old man who was dressed in black, and his head was wrapped in black, and he entered the Holy of Holies with me, but he did not leave with me. Shimon HaTzaddik understood this to be a sign that his death was impending. Indeed, after the pilgrimage festival of Sukkot, he was ill for seven days and died. And his fellow priests refrained from reciting the Priestly Benediction with the ineffable name of God.

I would be met by an old man- In the Jerusalem Talmud it asks and it is written "and every person won't be in the temple of meeting" and even Angels as it is written "and their faces were like the faces of man" and therefore it seems that it (this old man was the manifestation of) was the divine presence

Blessed is you Hashem Our God King of the Universe. Who has sanctified us in the holiness of Aharon and commanded us to bless his nation Israel with love.