The Son is in the Father:
"At that day you will know that I am in My Father,
and you in Me, and I in you." (John 14:20).
"No one has seen God at any time. The only begotten Son, who is in
the bosom of the Father, He has declared Him." (John 1:18).
The Holy Spirit is in the Son:
"Then Jesus, being filled with the Holy Spirit,
returned from the Jordan and was led by the Spirit into the wilderness..."
"Behold! My Servant whom I uphold, My Elect One in whom My soul
delights! I have put My Spirit upon Him; He will bring forth justice to the Gentiles."
"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." (Isaiah 11:1-2).
"The Spirit of the Lord GOD is upon Me, Because the LORD has anointed
Me to preach good tidings to the poor;
He has sent Me to heal the brokenhearted, to proclaim liberty to the captives,
and the opening of the prison to those who are bound; to proclaim the acceptable
year of the LORD, and the day of vengeance of our God; to comfort all who
mourn, to console those who mourn in Zion, to give them beauty for ashes,
the oil of joy for mourning, the garment of praise for the spirit of heaviness;
That they may be called trees of righteousness, the planting of the LORD,
that He may be glorified." (Isaiah 61:1-3, Luke 4:18-19).
"For He whom God has sent speaks the words of God, for God does not give
the Spirit by measure." (John 3:34).
"The word which God sent to the children of Israel, preaching peace through
Jesus Christ - He is Lord of all - that word you know, which was proclaimed throughout
all Judea, and began from Galilee after the baptism which John preached: how God anointed
Jesus of Nazareth with the Holy Spirit and with power, who went about doing good and
healing all who were oppressed by the devil, for God was with Him. "
Some readers understand the above passages as referring to the anointing of Jesus' humanity
with the Holy Spirit, though none is so limited by the text. They understand
this anointing as inviting the Holy Spirit into a temple no longer polluted,
but cleansed and renovated by the incarnation. To show the mutual indwelling
of Son and Holy Spirit, these readers may prefer a reference from Old Covenant
times. Such is, for instance, 1 Peter 1:10-11, where the Holy Spirit
is called "the Spirit of Christ": "Of this salvation the
prophets have inquired and searched carefully, who prophesied of the grace
that would come to you, searching what, or what manner of time, the Spirit of Christ
who was in them was indicating when He testified beforehand the sufferings of Christ and the
glories that would follow." The Spirit which inspired the prophets is called "the
Spirit of Christ" both by virtue of proceeding through Him and also by virtue of their mutual
indwelling: "For the testimony of Jesus is the spirit of prophecy."
The Holy Spirit is in the Father:
"But God has revealed them to us through His Spirit. For the Spirit searches all
things, yes, the deep things of God. For what man knows the things of a man except the spirit
of the man which is in him? Even so no one knows the things of God except the Spirit of God."
(1 Corinthians 2:10-11).
The Father is in the Holy Spirit:
"...in whom the whole building, being fitted together, grows into a holy
temple in the Lord, in whom you also are being built together for a dwelling place of God in the
Spirit." (Ephesians 2:21-22).
"There is one body and one Spirit, just as you were called in one
hope of your calling, one Lord, one faith, one baptism, one God and Father
of all, who is above all, and through all, and in you all." (Ephesians
How is God the Father "in you all"? By the indwelling Spirit.
The Son is in the Holy Spirit:
Jesus promised to abide with those who loved Him: "Jesus answered and said to him, 'If anyone
loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home
with him.'" (John 14:23). Specifically, He promised His followers that the Holy Spirit would
come to dwell in them: "And I will pray the Father, and He will give you another Helper, that He may
abide with you forever - the Spirit of truth, whom the world cannot receive, because it neither sees
Him nor knows Him; but you know Him, for He dwells with you and will be in you. I will not leave
you orphans; I will come to you." (John 14:16-18). It is by the infilling of the Holy Spirit
that Jesus dwells in our hearts: "For this reason I bow my knees to the Father of our Lord Jesus
Christ, from whom the whole family in heaven and earth is named, that He would grant you, according
to the riches of His glory, to be strengthened with might through His Spirit in the inner man, that
Christ may dwell in your hearts through faith..." (Ephesians 3:14-17). Only if Jesus were in
the Holy Spirit could this be one of the means by which Jesus dwells with His sheep.