6238. 'As Reuben and Simeon will they be mine' means that they will be truth and the good of truth. This is clear from the representation of 'Reuben' as faith in the understanding, and the truth of doctrine by means of which one is able to arrive at the good of life, dealt with in 3861, 3866, thus in general truth that belongs to the understanding; and from the representation of 'Simeon' as faith in the will, consequently truth realized in action, which is the good of faith or the good of truth, dealt with in 3869-3872, 4497, 4502, 4503, 5626, 5630, thus in general good which belongs to the new will. The things that Ephraim and Manasseh represent are clearly similar to all this.

[2] But since Reuben profaned what he represented, 4601, and Simeon polluted what he represented, 4497, 4501, 4507, on account of which they were cursed, see verses 3-7 of the next chapter, they lost their birthright and Joseph's sons Ephraim and Manasseh were acknowledged as the firstborn in place of them, 1 Chronicles 5:1. Nevertheless what Reuben and Simeon represented remained with them, for it makes no difference what the character of the person who serves to represent something is like, 665, l097 (end), 4281. That is to say, the representation of faith in the understanding remained with Reuben, and the representation of faith in the will with Simeon. But what resided with Ephraim was the representation of the Church's understanding, and what resided with Manasseh was the representation of the Church's will.

352. 'The firstborn of the flock' means the holy which is the Lord's alone. This becomes clear from the firstborn in the representative Church, where everything was holy because it had regard to the Lord, who alone is 'the Firstborn'. Love and faith deriving from it are the firstborn. All love is the Lord's and not a trace of it man's, and this is why the Lord alone is 'the Firstborn'. This was represented in the Churches of the ancient era by the requirement to consecrate the firstborn of man and of beast to Jehovah, Exodus 13:2, 12, 15. It was also represented by the tribe of Levi, which in the internal sense means love - though Levi was born later than Reuben and Simeon, who in the internal sense mean faith - being taken instead of all the firstborn and becoming the priesthood, Numbers 3:40-46; 8:14-20. That the Lord as regards His Human Essence is the Firstborn of all is clear from the following statement in David,

He will cry to Me, You are My Father, My God, and the Rock of My Salvation; I will also make Him as the Firstborn, supreme over the kings of the earth. Psalms 89:26-27.

And in John,

Jesus Christ, the Firstborn from the dead, and Prince of the kings of the earth. Revelation 1:5.

Please note that the firstborn of worship mean the Lord, while the firstborn of the Church mean faith.