In the Christmas story, the wise men bring gifts to the Lord: gold, frankincense and myrrh.

The gold is listed first, because it is the inmost - signifying good, e.g. the good that we do when we love the Lord and the neighbor.

The frankincense is next. It signifies rational truth, which is the set of true ideas that we know, not about external things like cars or cooking, but about what is really good, and what is really true.

These rational truths are built on earlier knowledges that we learn, before we have really made them our own. Those early knowledges about spiritual things - often learned in childhood - are represented by the myrrh.

In a way, these gifts are really a reciprocation. We can't actually give them to the Lord until the Lord has given them to us. We necessarily start out by learning and doing the Lord's law (myrrh). The Lord can then call up those memories to become rational truths (frankincense). Then, over time, and with effort, those truths can be transformed into good (gold). The wise men from the East had gone through this process of learning and becoming vessels that could receive truths and goods. They were able to perceive the Lord's birth, and find him, and bring gifts to him.

2021. 'For an eternal covenant' means conjunction with these people. This is clear from the meaning of 'a covenant' as conjunction, dealt with already in 665, 666, 1023, 1038; and that this conjunction is with those called 'the seed' is clear from the fact of its coming immediately after a reference to that 'seed', and of its being a second mention in this verse of a covenant. Thus the first mention of 'a covenant' has reference to the union of Jehovah with the Human Essence, and the second to the conjunction with those who are 'the seed'. To allow a clearer idea of the union of the Lord's Divine Essence with the Human Essence and of the conjunction of the Lord with the human race by means of the faith that inheres in charity, let the term union here and from now on be used to describe the first of these, and conjunction the second. Indeed the bond between the Lord's Divine Essence and Human Essence really was a union, but that between the Lord and the human race by means of the faith that inheres in charity is conjunction. From this it is clear that because Jehovah or the Lord is Life, His Human Essence became Life as well, as shown above. It was a union of life with life. Man however is not life but a recipient of life, as also shown already. When life flows into a recipient of life conjunction takes place, for life accommodates itself to the recipient as active does to passive or as that which in itself is living does to that which in itself is dead but made living from that which in itself is living. In the case of the principal and the instrumental, as they are called, they do indeed seem to have been joined together to exist as one. Nevertheless they are not one, for each exists by itself. Man does not live of himself, but the Lord in His mercy links him to Himself and in so doing causes him to live for ever. And because the Lord and man are distinct and separate from each other the term conjunction is used.