In John 17 Jesus prays for His disciples and those who would believe because of their word. He prayed that they would be one even as He and the Father are one. He said, “as You, Father, are in Me and I in You, that they also may be in Us…”
Later, after the cross and the death, burial, resurrection and ascension, the Apostle Paul teaches us nothing less than this same thing has actually occurred. He said in Colossians 1 that he was made a minister of the church in order to declare a mystery that had been hidden for ages and generations, but has now been manifested. He said this great mystery is “Christ in you, the hope of glory.” In preaching this message his goal was to present every man complete in Christ. You see until we have Christ in us we are incomplete; for God created us to be one with Him and that only takes place through the cross.
In Romans 6 we discover those of us who have been baptized into Christ have been baptized into His death and joined with Him in His burial and resurrection. God was in Christ reconciling the world to Himself; so for those of us who place our faith in Him we have Him in us and we are complete. This word complete is actually not the word used in the trusty King James Bible rather it’s the word “perfect.” Hebrews 10:14 tells us “For by one offering He has perfected for all time those who are sanctified.”
Not only did Jesus become sin on the cross, He has joined us to himself spirit to Spirit in the process thereby making us the righteousness of God in Him. Just as Jesus prayed we have become one with Him, a new creature. In fact according to Ephesians 2 not only have we been raised, as in resurrected, we have also been “seated with Him in the heavenly places in Christ Jesus.”
Colossians 3 instructs us “If you have been raised up with Christ, keep seeking the things above, where Christ is, seated at the right hand of God. Set your mind on the things above, not on the things that are on earth. For you have died and your life is hidden with Christ in God. When Christ, who is our life, is revealed, then you also will be revealed with Him in glory.” This is why Paul says things like “I have been crucified with Christ; and it is no longer I who live, but Christ lives in me; and the life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself up for me.” So you see Christ not only lives in us, He is our life. The Bible clearly states Christ is the head and the believers are His body. You can’t separate a head from a body so when you see the body your’e seeing the head. The two truly are one.