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.

Christ is one of the names of the Lord. It derives from Greek, and means "the anointed one," a King or Messiah. Christ as King brings to mind the infinite Divine truth, while Jesus as savior brings to mind the infinite Divine mercy and love. Together they mean both of these qualities conjoined and so bring to mind the very essence of the Lord.

(References: Apocalypse Revealed 520 [1,2,3]; Arcana Coelestia 1999 [2], 3004, 3005, 3006; True Christian Religion 298)