Firstborn, in a supreme sense, represents the Lord as to divine celestial love, and also peope who were of the celestial church. The sanctification of the firstborn, as in Exodus 13, signifies faith in the Lord. The firstborn, in the spiritual sense of the Word, is good, for with infants the good of innocence is first infused by the Lord, by virtue of which man first becomes a man. Since good is of love, and man does not reflect upon his own love, but only upon the thoughts of his memory, and since good has not at first a quality, but acquires one when it is formed in truths, and without a quality nothing is perceived, hence it was unknown that good was the primary principle, or firstborn. Good is first conceived from the Lord in man, and is produced by truths, in which good is manifested, in its own form and effigy. Firstborn, as in Psalm 89:28, signifies the Lord's humanity.

5869. 'And Joseph could not contain himself before all those standing with him' means that now everything had been prepared by the internal celestial for the joining together. This is clear from the representation of 'Joseph' as internal good, dealt with in 5805, 5826, 5827, thus the internal celestial, for the expression 'the celestial' is used to mean good that emanates from the Lord; and from the meaning of 'not being able to contain himself' as the fact that everything had been prepared for the joining together. For when someone prepares himself most eagerly to achieve some end or effect, by seeking out and organizing the means to achieve it, he can no longer contain himself once all the preparations are complete. This is the meaning of the words under consideration here. For the chapter before this dealt with the initial steps that were taken to achieve the joining together, whereas the present chapter deals with the actual joining together, see 5867. 'All those standing with him' means the kinds of things which prevent the joining together and which were therefore cast away, as stated in what follows.