Paul says in Ephesians 4:4 that there is “one Spirit.” But the Bible speaks of the “Spirit of God” and the “Spirit of Christ” which involves two DIVINE beings. If the Father has a Holy Spirit, the Son must too. So how then is there only one Spirit? The answer is something the majority miss because most have been indoctrinated with the Catholic idea of the Holy Spirit as another being rather than God’s own Spirit. God and His Son have a shared Spirit and that is how “They” represent “Themselves” where they are not personally present.
So the Holy Spirit is the mind, power, character and personal presence of the very life of God that the Father sends through His Son to us. Or to put it another way to make sure this is clear; the Holy Spirit is the presence and power of the Father manifested through Jesus Christ, His only begotten son. This is not a separate person of the Godhead who is being sent, it is the very life of God coming to us through His Son.
“But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.” 1 Corinthians 1:24
Everything Christ received He inherited from His Father including His very own life which is self-existent as it came from the Father. “For as the Father has life in himself; so has he given to the Son to have life in himself.” John 5:26
But not only His life but Christ also received of His Father’s Spirit. Thus the Father and Son are one in Spirit, and that one Spirit proceeds from the Father and comes to us through His Son. This is why Paul equates the “Spirit of God” with the “Spirit of Christ” as it is the same one Spirit of God the Father and His Son Jesus Christ. And so we find that the Holy Spirit is the same Spirit whether it is spoken of as pertaining to God or Christ.
“But you are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.” Romans 8:9
Referring to the Holy Spirit, Paul says that Christ is that Spirit. “Now the Lord [Jesus] is that Spirit: and where the Spirit of the Lord is, there is liberty.” 2 Corinthians 3:17
And further, while Paul wrote in Ephesians 4:4 that there is only one Spirit, he again tells us in Galatians 4:6 that this Spirit is the Spirit of our Lord Jesus Christ, which He received from His Father. So when you receive the Spirit of God, you receive the Spirit of His Son into your heart also. The Father did not send another individual. He sent the Spirit of His Son. “God has sent forth the Spirit of his Son into your hearts, crying, Abba, Father.” Galatians 4:6
How do both the Father and Son live in us? Since they are one in Spirit, it is by the Holy Spirit. “If a man love me, he will keep my words: and my Father will love him, and WE will come unto him, and make our abode with him.” John 14:23
And being one in Spirit gives us access to the Father through Christ our mediator. “For through him [Christ] we both have access by one Spirit unto the Father.” Ephesians 2:18
As Jesus said, “No one comes to the Father except through Me.” John 14:6
So it is by the Holy Spirit that Christ lives in us which also gives us access to the Father. “I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me:” Galatians 2:20
The Spirit of Christ is our Comforter (parakletos) which also means “helper” and is translated as such in the NKJV, “For I know that through your prayers and the help given by the Spirit of Jesus Christ, what has happened to me will turn out for my deliverance.” Philippians 1:19
And since the Holy Spirit is the Comforter and Spirit of truth, if the Father and Son were not one in Spirit, then Christ by His Spirit could not be the Comforter and Spirit of truth. It is only by sharing the same Spirit that this is possible.
Christ had also spoken through all the prophets. “Searching what, or what manner of time the Spirit of Christ which was in them did signify, when it testified beforehand the sufferings of Christ, and the glory that should follow.” 1 Peter 1:11
Christ has always partaken of the Spirit of God since He was begotten of the Father before they created anything. When Jesus was incarnated on earth 2000 years ago, He was full of that same Holy Spirit of God from His conception, and throughout His earthy sojourn as the Son of Man. After His resurrection and ascension to Heaven, He sent “another Comforter” to earth to empower His people till the end of time, which was Himself in Spirit form. Only the Father and the Son can be present outside of their bodies throughout the Universe. Their Holy Spirit is the way in which they are omnipresent while also being physically present in the Heavenly Sanctuary as we speak. This is where the nascent Catholics made their mistakes when coming up with the incomprehensible doctrine of the trinity versus the plain word of God. In creating the trinity they philosophized when they should have left it alone as it is totally un-Scriptural.
“And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit. Howbeit that was not first which is spiritual, but that which is natural; and afterward that which is spiritual. The first man is of the earth, earthy: the second man is the Lord from heaven.” 1 Corinthians 15:45-47
Here the Apostle Paul is talking about the two Adams. The first Adam was the first created man on earth who sinned by eating the forbidden fruit. The second (last) Adam is Christ who came to redeem us. Notice that Paul says that this One was made “a quickening spirit.” This is the other important thing about Christ. Not just His earthly human life, but also what happened after. In verse 46 Paul clarifies that the natural comes first and then the spiritual. This is exactly what happened with Jesus. He came to earth first as a man, ministered, ascended to Heaven, and then at Pentecost He came back in Spirit with mighty power! Both times was to instruct and sanctify His people, and that is the same purpose today. So the Holy Spirit of God the Father is now also the Spirit of Christ which point Paul confirms in verse 47. So “the Lord from Heaven” in verse 47 is the “quickening Spirit” of verse 45. It cannot be any clearer. The Spirit of God and of Christ is the third entity of the Godhead, but it is not another being any more than our Spirit is another being.
However, the Spirit of the Father and Son as divine beings can do something we cannot. They can leave their bodies in one place, and also be omnipresent anyplace throughout the universe at the same time by their Holy Spirit. In this way they can also enter the hearts of a repentant believer. The teachings of the Catholic trinity (three persons in one god) are now rampant in most Churches which destroys this wonderful truth of who the Holy Spirit really is by the introduction of a totally different third being which does not actually exist! And as if that were not bad enough, Satan receives the unwitting worship of millions upon millions of people through this serious deception that he has inspired man to create.
In conclusion, the Holy Spirit is the very life of God coming from the Father and shared by the Son. It is the personal presence of the Father and the Son given to us. Those who partake of this divine presence and power within, the life of God, and allow Him to transform their characters into the likeness of His Son will someday personally meet this wondrous God of love.