Advent is Trinitarian
What now? But didn't you say last week that it was all about Jesus? Well, yes I did. But who is Jesus? Isaiah 11 has a wonderful Advent picture of who He is:
There shall come forth a Rod from the stem of Jesse, And a Branch shall grow out of his roots. The Spirit of the Lord shall rest upon Him, The Spirit of wisdom and understanding, The Spirit of counsel and might, The Spirit of knowledge and of the fear of the Lord. His delight is in the fear of the Lord (Isaiah 11:1-3)
Jesus is the Rod of Jesse. When the royal house of Jesse's son David has been reduced to nothing, a new son of Jesse comes forth, great David's greater Son. And like the old David, this new David is anointed. But unlike the old David, this new David isn't anointed with oil by a prophet, but with the Spirit, by the LORD.
Look in those verses from Isaiah 11. What do you see? The LORD who anoints and who is feared, the promised King, and the Spirit of the LORD. The Father, the Son and the Holy Spirit. Advent is Trinitarian.
And it's not simply that one adventy passage displays our Triune God. Rather, it's simply that if Advent is all about Jesus, then Advent must be Trinitarian. For that's who Jesus is. He is the Christ, the Messiah, the Anointed One. And one can't be anointed without an anointer and an anointing. The Father anoints Jesus with the Spirit. The Anointer pours out the Anointing on the Anointed One. That's who Jesus is.
So this Advent, look to Christ 'who is the image of God' (2 Cor. 4:4) who makes God known (John 1:18). The God whom He reveals is the Triune God. Look to Jesus and behold your God.