3. “God, thy God”, it says, “hath anointed thee with the oil of gladness above thy fellows” (Ps. 45:7). The same one is both perfect God and perfect man; the same God is both the one who anoints and is anointed. For it says, “God, thy God hath anointed thee”, It is as man that the Word from God the Father is anointed, and He is anointed with the co-eternal Spirit who is of one nature with Him. This is the oil of gladness, which is why; again, it is the same God who is both the divine unction and the one anointed. But although He is anointed as man, as God He has the source of anointing within Himself. That is why he who beheld things in a divine manner saw and foretold that all those anointed by God were partakers of His life. For it is the property of God alone not to partake of the lives of others but to be partaken of, and to have as partakers those who rejoice in the Spirit. Such is the infant born now in the lowly stable, and hymned by us as a babe in the manger. — St. Gregory Palamas, Homily Fifty-Eight on the Saving Nativity According to the Flesh of Our Lord and God and Savior
Yesterday, I mentioned that in re-reading Psalm 45, I saw a glimpse of the Trinity in verse 7. Again, this is why I love reading the Fathers — their relationship with Scripture really puts modern man to shame. Whereas I only saw the obvious — the Father and the Son — St. Gregory sees the Holy Spirit as well.
Therefore God, your God, has anointed you with the oil of gladness beyond your companions. — Psalm 45:7
To review, the first God is the King — the Son. The God of the King is the Father. The King — the Son — is anointed by God the Father with the Holy Spirit. In other words, the image Palamas is invoking from this verse will come to fruition a week after Christmas at Theophany:
At that time, Jesus came from Nazareth of Galilee and was baptized by John in the Jordan. And when he came up out of the water, immediately he saw the heavens opened and the Spirit descending upon him like a dove; and a voice came from heaven, “You are my beloved Son; with whom I am well pleased.” — Mark 1:9-11
Once again we see the way that the Church understands and uses Scripture. It is not a bunch of books to be separated into category by context, author and redactor; rather, it is one book written by many over time inspired by the Holy Spirit. It is thus perfectly acceptable to see and understand Psalm 45 in terms of Christmas and Theophany as well as the Annunciation.