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,
And He shall not judge by the sight of His eyes,
Nor decide by the hearing of His ears;
But with righteousness He shall judge the poor,
And decide with equity for the meek of the earth;
He shall strike the earth with the rod of His mouth,
And with the breath of His lips He shall slay the wicked.
Righteousness shall be the belt of His loins,
And faithfulness the belt of His waist.
(Isaiah 1:1-4)
clearly THE BRANCH is Jesus Christ, the Messiah, risen out of the line of David.
John the baptist testifies of this, saying he saw the Spirit rest upon Him ((John 1:32)) - signifying who He is.
again Christ says, "I AM the True Vine" ((John 15:1)) - invoking the ineffable name, the Tetragrammaton, identifying God as both Vinedresser and Vine, Father and Son.
"Behold, the days are coming,” says the Lord,
“That I will raise to David a Branch of righteousness;
A King shall reign and prosper,
And execute judgment and righteousness in the earth.
In His days Judah will be saved,
And Israel will dwell safely;
Now this is His name by which He will be called:
THE LORD OUR RIGHTEOUSNESS."
(Jeremiah 23:5-6)
the name of THE BRANCH is THE LORD OUR RIGHTEOUSNESS
the Messiah is here literally called YHVH, our righteousness
here again:
of Him are ye in Christ Jesus, who of God is made unto us
wisdom, and righteousness, and sanctification, and redemption
(1 Corinthians 1:30)
the LORD is our righteousness.
Christ is our righteousness.
Christ is the LORD, our righteousness
this isn't monism; God is One; there is only one God. but I AM THAT I AM has clearly revealed Himself both in the person of the Father and of the Son. it is not simple -- to know Him is for the wise, even as He Himself is wisdom from God Himself.