There shall come forth a shoot from the stump of Jesse, and a branch from his roots shall bear fruit. And 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 the fear of the LORD. And his delight shall be in the fear of the LORD. He shall not judge by what his eyes see, or decide disputes by what his ears hear, but with righteousness he shall judge the poor, and decide with equity for the meek of the earth; and he shall strike the earth with the rod of his mouth, and with the breath of his lips he shall kill the wicked. Righteousness shall be the belt of his waist, and faithfulness the belt of his loins. The wolf shall dwell with the lamb, and the leopard shall lie down with the young goat, and the calf and the lion and the fattened calf together; and a little child shall lead them. The cow and the bear shall graze; their young shall lie down together; and the lion shall eat straw like the ox. The nursing child shall play over the hole of the cobra, and the weaned child shall put his hand on the adder’s den. They shall not hurt or destroy in all my holy mountain; for the earth shall be full of the knowledge of the LORD as the waters cover the sea. In that day the root of Jesse, who shall stand as a signal for the peoples–of him shall the nations inquire, and his resting place shall be glorious.
In that same hour he rejoiced in the Holy Spirit and said, “I thank you, Father, Lord of heaven and earth, that you have hidden these things from the wise and understanding and revealed them to little children; yes, Father, for such was your gracious will. All things have been handed over to me by my Father, and no one knows who the Son is except the Father, or who the Father is except the Son and anyone to whom the Son chooses to reveal him.” Then turning to the disciples he said privately, “Blessed are the eyes that see what you see! For I tell you that many prophets and kings desired to see what you see, and did not see it, and to hear what you hear, and did not hear it.”
Advent is the season of appearing. In Advent God makes himself known. Today’s passages reveal the deepest aspect of the mystery of God’s appearance: the fact that God is Trinity. Jesus did what he did because of who he was: God. Jesus was able to do what he did because of the power he received from the Holy Spirit. The work of Jesus from beginning to end was the work that the Father willed.
In Isaiah 11 we see that God’s kingdom comes through the Branch who judges righteous judgment. This righteous judgment is empowered by the Spirit of the Lord, the Spirit of wisdom and understanding, the Spirit of counsel and might, the Spirit of knowledge and the fear of the LORD. The gospels make the role of the Spirit in the life of Jesus unmistakable. It is by the Holy Spirit that he is conceived; the fills people to worship God because of Jesus; Jesus was announced as the one who would baptize with the Holy Spirit; the Holy Spirit rested on Jesus when he was baptized; it was in the power of the Spirit that Jesus entered the wilderness, left the wilderness, and began his teaching ministry; it was in the power of the Spirit that Jesus cast out demons; before he left Jesus promised to send the Holy Spirit to his disciples; Jesus commanded that new disciples be baptized in the name of the Father, and of the Son, and of the Holy Spirit; Jesus kept his promise and sent the Holy Spirit. Advent makes known the inseparable bond between Jesus the Messiah and the Spirit of the Lord.
But the advent of Jesus also makes known the inseparable bond between Jesus the Messiah and God the Father. In Luke we stand upon holy ground. We enter into the communication of the Trinity. In wonder and amazement we hear the Son of God proclaim that he has all of the authority of the Father. The sovereignty of God over salvation is made explicit. The Father hides salvation from some and reveals it to others. The Son chooses whom he will reveal the Father to. We know these hard words are true because who said them: Jesus the Son; and because of how he said them: “in the Holy Spirit.”
At Advent God makes himself known. God reveals that he is Triune: God the Father, God the Son, God the Holy Spirit. Three in person, one in essence.
Lo, how a Rose e’er blooming from tender stem hath sprung!
Of Jesse’s lineage coming, as men of old have sung.
It came, a floweret bright, amid the cold of winter,
When half spent was the night.
Isaiah ’twas foretold it, the Rose I have in mind;
With Mary we behold it, the virgin mother kind.
To show God’s love aright, she bore to men a Savior,
When half spent was the night.
The shepherds heard the story proclaimed by angels bright,
How Christ, the Lord of glory was born on earth this night.
To Bethlehem they sped and in the manger found Him,
As angel heralds said.
This Flower, whose fragrance tender with sweetness fills the air,
Dispels with glorious splendor the darkness everywhere;
True Man, yet very God, from sin and death He saves us,
And lightens every load.
O Savior, Child of Mary, who felt our human woe,
O Savior, King of glory, who dost our weakness know;
Bring us at length we pray, to the bright courts of Heaven,
And to the endless day!
 Luke 1:35
 Luke 1:41; 2:25-27
 Luke 3:16
 Luke 3:22
 Luke 4:1, 14, 18
 Matt. 12:28
 John 15:26
 Matt. 28:19
 John 20:22; Acts 2:33