It was the first sign and symbol of the world conquest of Christ. One of the most fascinating things about the wise men, to me, has always been the gifts they brought. To me, the gifts always seemed kind of silly for a baby. But actually the gifts are symbolic and quite appropriate. Think about it.
Gold is the gift for a king.
Frankincense is the gift for a priest. It was to be used in the Temple and in temple sacrifices. The function of the priest is to open the way to God for men and women. He opened the way for all of us into the very presence of God. Myrrh is the gift for one who is to die.