9819. 'And they shall make Aaron's garments' means through whom the spiritual kingdom exists. This is clear from the meaning of 'Aaron's garments' as a representative sign of the Lord's spiritual kingdom lying adjacent to His celestial kingdom, dealt with above in 9814. The reason why the wise at heart, filled with the spirit of wisdom, were to make those garments is that by these people those in the celestial kingdom are meant, and the spiritual kingdom is what springs from and so what covers that celestial kingdom like a garment next to the body, as also becomes clear from the things that have been stated in 9818.
Arcana Coelestia #3217
3217. When angels' discussion has to do with the understanding part of the mind, horses appear in the world of spirits below them, that is, in the communities which correspond to them. The size, shape, colour, and stance of the horses depends on the ideas which the angels have concerning the understanding. The horses also carry differing adornments. There is also a place quite deep down and a little towards the right which is called the abode of the intelligent. There horses are seen constantly, the reason being that those there are engaged in thought about the understanding; and when the angels who are engaged in a discussion about the understanding flow into the thoughts of those spirits, horses are seen. From this I have come to see what was meant by the horses seen by the prophets, and also by the horses mentioned in the Word, namely aspects of the understanding, 2760-2762.