1For every high priest, being taken from among men, is appointed for men in things pertaining to God, that he may offer both gifts and sacrifices for sins. 2The high priest can deal gently with those who are ignorant and going astray, because he himself is also surrounded with weakness. 3Because of this, he must offer sacrifices for sins for the people, as well as for himself. 4Nobody takes this honor on himself, but he is called by God, just like Aaron was. 5So also Christ didn’t glorify himself to be made a high priest, but it was he who said to him,
“You are my Son.
Today I have become your father.”
6As he says also in another place,
“You are a priest forever,
after the order of Melchizedek.”
7He, in the days of his flesh, having offered up prayers and petitions with strong crying and tears to him who was able to save him from death, and having been heard for his godly fear, 8though he was a Son, yet learned obedience by the things which he suffered. 9Having been made perfect, he became to all of those who obey him the author of eternal salvation, 10named by God a high priest after the order of Melchizedek.
11About him we have many words to say, and hard to interpret, seeing you have become dull of hearing. 12For although by this time you should be teachers, you again need to have someone teach you the rudiments of the first principles of the revelations of God. You have come to need milk, and not solid food. 13For everyone who lives on milk is not experienced in the word of righteousness, for he is a baby. 14But solid food is for those who are full grown, who by reason of use have their senses exercised to discern good and evil.
Aaron was the son of Amram and Jochebed, the brother of Moses and Miriam, and the first priest of Israel. God appointed Aaron to be Moses' spokesman in his audiences with the unnamed Pharaoh of Exodus. As a symbol of his office, Aaron received a magical rod. He turned the rod into a snake - the first in a series of signs, by which he and Moses hoped to persuade Pharaoh to let the Israelites leave Egypt. Aaron also used the rod to call down three of the plagues that followed this first sign (polluting the Nile, frogs and gnats). God also caused the rod to blossom and bear ripe almonds, as a sign that Aaron's descendants would inherit the priesthood.
God summoned Aaron to be present when Moses received the Ten Commandments. But Aaron did not stay on Sinai. Instead he agreed to oversee the casting of an idol (a golden calf) for the Israelites who had rebelled against the authority of the absent Moses.
Aaron was generally a supporter of Moses, but took him to task for his marrying a Cushite wife. For this God rebuked Aaron (and Miriam). His role as priest was critical when he made atonement for the Israelites and stayed the plague that had followed the rebellion of Dathan and Abiram. Exodus and Leviticus give a detailed account of the vestments and duties of Aaron and of his sons.
Aaron's elder sons, Nadab and Abihu, died early but the younger pair, Eleazar and Ithamar, succeeded him in the priesthood. When Aaron was a hundred and twenty three, God instructed him to go up onto Mt. Hor, where he died. Aaron figures prominently in Exodus, Leviticus, Deuteronomy and Numbers, and is named in other books of both Old and New Testaments.