Aaron was the brother of Moses. He symbolizes two things, at different stages of the story.

During the first part of the exodus, when he was Moses' spokesperson, Moses represents the Word as it truly is, as it is understood in heaven, while Aaron represents the Word in its external sense, as it is understood by people in the world. This is why Aaron talks for Moses, and the Lord says of him "he shall be as a mouth for you, and you shall be to him as God." (Exodus 4:16)

Later, after the Tabernacle was built and he was inaugurated as high priest (see Leviticus 8,9), Aaron represents the Lord as to the Divine Good, and Moses represents the Lord as to the Divine Truth.

In Exodus 28:1, Aaron signifies the conjunction of Divine Good with Divine Truth in the Divine Human of the Lord. (Arcana Coelestia 9806, 9936)

In Exodus 32:1, Aaron represents the external of the Word, of the church, and of worship, separate from the internal. (Arcana Coelestia 10397)

In Exodus 4:14, before he was initiated into the priesthood, Aaron represents the doctrine of good and truth. (Arcana Coelestia 6998)

1793. That 'the Lord Jehovih' is the Internal Man in relationship to the Interior Man is clear from what has been stated about the Lord's Internal Man, namely that it was Jehovah Himself, from whom He was conceived, whose only Son He was, and to whom the Lord's Human became united after the maternal human, that is, the human derived from the mother, had been purified by means of the conflicts brought about by temptations. In the Word 'Lord Jehovih' occurs quite often; indeed for as many times as Jehovah is called the Lord He is not named 'Lord Jehovah' but 'Lord Jehovih'; and especially so when temptations are the subject, as in Isaiah,

[2] Behold, the Lord Jehovih is coming with might, and His arm will exercise dominion for Him; behold, His reward is with Him, and His work before Him. He will pasture His flock like a shepherd, He will gather the lambs into His arm, and will carry them in His bosom, and will lead those that give suck. Isaiah 40:10-11.

Here 'the Lord Jehovih is coming with might' has reference to victory in the conflicts brought about by temptations. 'His arm will give Him dominion' stands for His winning it by His own power. What the 'reward' is that is referred to in the previous verse is stated here, namely that it is the salvation of the whole human race, that is, 'He pastures His flock like a shepherd, gathers the lambs in His arm, carries them in His bosom, and leads those giving suck', all of which things belong to inmost or Divine love.

[3] In the same prophet,

The Lord Jehovih opened my ear, and I was not rebellious, I turned not backwards. I gave my body to the smiters, and my cheeks to those who pluck them. I hid not my face ¹ from insults and spitting; and the Lord Jehovih will help me. Behold, the Lord Jehovih will help me. Isaiah 50:5-7, 9.

This plainly refers to temptations. And there are other examples besides these.

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