10017. 'And the priesthood shall be theirs' means the stages, following one after another, of the Lord's work of salvation. This is clear from the meaning of 'the priesthood' or 'the priestly office' as that which is representative of the Lord's whole work of salvation, dealt with in 9809. The reason why the stages following one after another is meant is that the priesthood of Aaron's sons is the subject here, and his sons represent the things which emanate and so follow in order one after another, 9807. The situation in all this is that the priesthood which Aaron represents consists in the work of saving those who are in the Lord's celestial kingdom, this kingdom being the proper meaning in the Word of 'a kingdom of priests'. But the priesthood which Aaron's sons represent consists in the work of saving those who are in the Lord's spiritual kingdom emanating directly from His celestial kingdom. From this it is evident that 'the priesthood' is used in the present instance to mean the stages, following one after another, of the Lord's work of salvation. But the priesthood which the Levites represent consists in the Lord's work of salvation at a further stage.

[2] There are three realities which follow one another in order. These are the celestial, which is the good of love to the Lord; the spiritual, which is the good of charity towards the neighbour; and the natural springing from these, which is the good of faith. Since these three are realities which follow one another in order there are also three heavens, and in them the types of good follow in that order. The work of saving those with whom celestial good exists is represented by Aaron's priesthood; but the work of saving those with whom spiritual good exists is represented by the priesthood of Aaron's sons, and the work of saving those with whom the natural good springing from these exists is represented by the priesthood of the Levites. And since the things following one another in order emanate from the good of love to the Lord, which is represented by Aaron and his priesthood, it is said of the Levites that they were given to Aaron. For things which emanate belong to that from which they emanate; such emanations or stages following one after another owe their very existence to that source, as accords with what has been stated a little above in 10011. The fact that the Levites were given to Aaron and his sons to perform priestly duties under them, see Numbers 3:1-end.

Generally, doors in the Bible represent the initial desires for good and concepts of truth that introduce us to new levels of love and understanding, and even to the Lord Himself. Since a “house” represents a person’s desires, affections and passions, the door serves to introduce true ideas that can put those desires into action.

In John 10:7, the door signifies the Lord, who is good itself and truth itself. (Arcana Coelestia 2356[2])

In Revelation 3:8; 4:1, the door signifies admission to the arcana of heaven revealed. (Apocalypse Explained 260[2])

The meaning depends on context, of course. For example, references to doorposts and lintels are making a distinction between introductory goods and introductory truths. And, in Sodom, Lot's house had two doors -- an inner one and an outer one. When, in Genesis 19:6, Lot tried to convince the men of Sodom not to attack the angels visiting him, he went outside the inner door, but stayed inside the outer door. There, the outer door represents a desire for good that is resistant to the falsity represented by the men of Sodom; the inner door represents true ideas springing from that desire for good. Someone nurturing a desire for good could be admitted through the first door, but would have to learn the truth about how to express that desire before being admitted through the second.

(Odkazy: Genesis 19)