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Union with Christ is a deep truth of the Christian faith. Our oneness with Christ—that we are in Christ and Christ is in us—is a truths that stands right at the heart of our faith. But it is a mystery too deep for the unregenerated to grasp. As Apostle Paul says in 1 Corinthians 2:14, to them, such a truth only sounds like foolishness; they can’t know it. But for us believers, it is a precious and exciting truth. Apostle Paul wrote in 1 Corinthians 6:17:
“But he who joins himself to the Lord becomes spiritually one with him.” [GNT]
Union with Christ is not just a theological concept—it is the very foundation of our salvation and Christian life. Union with Christ is not an abstract concept with no real life impacts—it is a reality of which radically changes how believers look at ourselves and relate to God. To be “in Christ” is to share in all that He is, did, and has. The Apostle Paul repeatedly uses the phrase “in Christ” to describe believers’ position before God, revealing that Christian life is not just about following Christ, but being vitally joined to Him.
Jesus Himself described this relationship in John 15:5: “I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing.” Our union with Christ is living, transformative, and eternal.
I want to examine this powerful spiritual reality in this article, and bring out 10 powerful meanings being united with Christ holds for believers. Understanding these things will strengthen your faith, and also equip you to walk in victory, joy, and spiritual authority.
What Union With Christ Really Means
Firstly, union with Christ denotes the position of believers in relation to Christ. Secondly, union with Christ is spiritual—a spiritual, yet real and experiential relationship with Christ. When a person puts faith in Jesus’s redemptive sacrifice for salvation, they enter into a spiritual union with Him—a deep, inseparable relationship in which all that Christ is, did, and has, become the believer’s own in a real sense.
Believers’ union with Christ is the vital side of redemption. The redemption through Christ has two sides: the legal side—what Christ had accomplished through His death and resurrection, which are available for all humans to receive, and the vital side—the application of Jesus’s sacrifice to the individual who believes, translating the fruits of Jesus’s sacrifice to tangible, experiential life for humans.
The legal side of redemption made everything ready for our enjoyment, and is the premise on which we receive them. The vital side of redemption is how we position ourselves to receive them, through believing. You can learn more about this subject through this article: Legal and Vital Sides of Redemption: 2 Essential Sides of Redemption Every Believer Must Know.
When we believed Christ, we became vitally united with Him. This truth is embedded within the phrase “in Christ”, which was used very frequently in the New Testament.
1 Corinthians 1:30:
“But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption.”
2 Corinthians 5:17:
“Therefore, if anyone is in Christ, he is a new creation; old things have passed away; behold, all things have become new.”
Images of Union With Christ in the New Testament
Many images were used to portray believers’ union with Christ in the New Testament. We are going to consider just two because of space.
The Image of Union With Christ In Baptism
One of the imageries used to portray our union with Christ is baptism. Apostle Paul wrote in Romans 6:3–5:
3 Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? 4 Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life. 5 For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection.
Paul used the imagery of baptism through immersion into water to teach the mystery of believers’ union with Christ. When we believed, beyond our immersion into water at baptism, an immersion occurred spiritually. We were immersed into Christ. God immersed us into Christ and all that He is, did, and has— that is, His person, sacrifice, and glorious riches, so that these things became ours in a real, tangible way.
Paul mentioned three levels of our union with Christ, which are in synch with the three stages of Jesus’s atoning works
1. United with Christ in His death. Though we were neither present at His crucifixion nor were we crucified with Him physically, still God made us to be partakers of His death by uniting is with Christ, so that we are reckoned to have died with Him.
It is why we, like Paul, can say, “I have been crucified with Christ…” By our union with Christ, His death became ours in a real and tangible way.
2. United with Christ in His Burial: “Therefore we were buried with Him through baptism into death…” (Romans 6:4). Again, though we didn’t enter the grave physically with Christ, we became partakers of His burial through our union with Him. Our entire old life—who we were as sinners and the sinful things that we did—was buried; totally forgotten. The Holy Spirit reveals through Paul, in 2 Corinthians 5:17:
“Therefore, if anyone is in Christ [in union with Christ], he is a new creation; old things have passed away…” [Parenthesis added].
3. United with Christ in His Resurrection: The Holy Spirit also reveals that we are united with Jesus’s resurrection, so that as He resurrected with newness—a new body that is not limited by physical objects, in the same way we were raised to an entirely new life with Christ.
2 Corinthians 5:17 says that if anyone is united with Christ, he is a new person. While our physical bodies didn’t change after we confessed faith in Christ, our spiritual outlook changed. God no longer sees us as sinners—that old person is dead and buried—but as totally new people.
This is the mystery that the physical act of baptism symbolizes. Colossians 2:11–13 says the same thing.
Believers’ union with Christ is not a figurative expression— it is the reality of all of us who have believed in Jesus. In a way that beats natural understanding, we are joined, in a real sense, spiritually, with the crucified, resurrected, and ascended Christ. We are thoroughly joined together that, like water from the same source poured into a jug from separate cups, we are indistinguishable and inseparable.
We are in Christ!
2 Corinthians 5:17:
“Therefore, if anyone is in Christ…”
And, Christ is in us!
2 Corinthians 13:5:
“Do you not know yourselves, that Jesus Christ is in you?”
We are one with Christ!
1 Corinthians 6:17:
“But he who joins himself to the Lord becomes spiritually one with him.” [GNT]
The Image of Union With Christ In Marriage
Another image used in the New Testament to illustrate believers’ union with Christ is marriage. The image of marriage was used to portray being in relationship with Christ through salvation. Paul used marriage to explain the relationship between Christ and believers in Romans 7:1–4. And, in Ephesians 5:22–33, which is popularly used to teach marriage, Paul was actually describing the union between Christ and believers. See verses 32:
“This mystery [of two becoming one] is great; but I am speaking with reference to [the relationship of] Christ and the church.” [Amp.]
The same is true of 2 Corinthians 11:2:
“For I am jealous for you with godly jealousy. For I have betrothed you to one husband, that I may present you as a chaste virgin to Christ.”
Union With Christ: Two Become One
Through marriage, two become one. A man and a woman become a new entity—they become one. They are no more two. God Himself revealed this mystery with the first marriage in Genesis 2:24. The man and the woman enter into a common life, sharing their lives together and having all things in common. What one has become the possession of the other.
In the same way, through our union with Christ, one new entity was created. Believers and Christ became one. We came into a common life with Him, where we share in all that He is—His personality, what He did—His death and triumphant resurrection, and what He has— His abundant riches in glory. What is true of Christ became true of us. We are in this world as He is.
1 John 4:17:
“In this [union and fellowship with Him], love is completed and perfected with us, so that we may have confidence in the day of judgment [with assurance and boldness to face Him]; because as He is, so are we in this world.” [Amp.]
All that is Christ’s are already ours. We are complete in Him—lacking nothing. Being united with Christ, we have all that is necessary for a victorious, rich, and fulfilling life, as He lived on earth.
2 Peter 1:3:
“For His divine power has bestowed on us [absolutely] everything necessary for [a dynamic spiritual] life and godliness…” [Amp.]
Colossians 2:9-10:
9 For in Christ the Godhead in all its fullness dwells incarnate; 10 And, by your union with Him, you are also filled with it…” [Amp.]
The Father’s intent is that we be like Christ (Romans 8:29). This, He filled us with all of Christ—His righteousness nature, authority, life, graces, and glory, etc., so that we can live like Him.
Through our union with Christ, all of Christ became ours—His divine life, nature, graces, authority, powers, etc.—in a real sense, flowing to us as from the Vine to the branches. In John 15:5, Jesus used an image—the vine and its branches to illustrate our joining to Him. He described Himself as the Vine and we as the branches. We are not just hanging casually or loosely on Christ. We are grafted into Christ (Romans 11:17). Thus, we are partakers of His riches.
All of God’s blessings are in Christ (Ephesians 1:3). Therefore, being united with Christ, we are in the position where we can enjoy all of God’s precious riches, merited by His life, death, and resurrection. All things that are Christ’s are also ours! So, we can live like Christ in this world. You see, being Christlike is not only about not sinning. It includes functioning in authority and power as Christ did.
10 Powerful Meanings Union with Christ Holds for Believers
Now, I want to outline what being united with Christ means for us as believers.
- Union with Christ Means New Identity
The first implication of our being united with Christ is that we have a new identity. In Christ, we are brand new! 2 Corinthians 5:17 says, ““Anyone who is joined to Christ is a new being; the old is gone, the new has come.” God no more sees us through our pasts, failures, or backgrounds, but through all that Christ is and did—as blameless and pleasing to Him (Colossians 1:19–22).
It is fine if unspiritual people still define you by your pasts, failures, and backgrounds. But it is a rubbishing of Jesus’s precious sacrifice to be defining yourself by them.
- Union with Christ Means Sharing God’s Life
Christianity is God’s life in human spirit. The life is in Christ (John 5:26). John 1:4 says, “In Him was life…” Thus, having been united with Christ, we have God’s life in us (1 John 5:11–12). Christianity is not about striving in your own strength—it’s about living by the divine life within you.
- Union with Christ Means Access to God
Christ is a part of the Godhead. Being united with Him says that we are also united with the Father (John 14:7-11; 1 John 1:1–3). God is no longer far from us. Ephesians 2:18, “For through Him we both have access by one Spirit to the Father”. We are not dealing with a God who is far away.
- Union with Christ Means Inheritance in God’s Family
All the things of God have been handed to Christ (John 3:35). And, being united with Christ, we have become co-owners of all of God’s riches with Him. These are not high sounding words but realities of union with Christ founded on biblical revelation. Romans 8:17, “And if children, then heirs—heirs of God and joint heirs with Christ.” All the things of God are available to us. We’ve got to learn to live by these truths, not by fear of lack or defeat.
- Union with Christ Means Righteousness
Christ is righteous, and He embodied divine righteousness. Being united with Him, we shared His righteousness. 2 Corinthians 5:21, “For He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him”
This means we are no longer condemned. We stand blameless before God, and can live free of guilt, shame, and the fear of God’s judgement.
- Union with Christ Means Victory Over Sin
Being united with Christ translates to victory over sin for us. Romans 6:6 says that our old man—the corrupted nature that ruled us and produced sin in us before salvation—was crucified with Christ so that we should no longer be slaves of sin. Sin no longer has dominion over us. The power of Christ in us enables us to live free. You see, we must always uphold our redemption realities above our physical frailties.
- Union with Christ Means Victory Over the Power of the Devil
I say to the saints of God in my local church that there is nothing that Christ obtained through His sacrifice that He needs; they’re all meant for us. Christ’s victory through the cross is for us. Colossians 2:15 says that Christ disarmed principalities and powers, and triumphed over them in the cross. Then, 1 Corinthians 15:57 says:
“But thanks be to God, who gives us the victory through our Lord Jesus Christ.”
In union with Christ, you are more than a conqueror (Romans 8:37). Stand firmly against fear and spiritual oppression, and enforce your victory in all areas of your life, knowing you share in Christ’s triumph.
- Union with Christ Means Transformation by the Spirit
Union with Christ is not static; it’s a transforming relationship. While Christ permits men to come to Him as they are, He does not leave them as they are. But through the sanctification works of the Spirit of Christ, we are progressively but consistently changed and being shaped into Christ’s likeness. 2 Corinthians 3:18 says:
“But we all, with unveiled face, beholding as in a mirror the glory of the Lord, are being transformed into the same image from glory to glory, just as by the Spirit of the Lord.”
Every believer must learn to cooperate with the Spirit’s sanctification work. Because while our being born again was exclusively God’s work, our spiritual growth requires our active cooperation with God.
- Union with Christ Means Sharing in His Suffering
Philippians 1:29 says, “For to you it has been granted on behalf of Christ, not only to believe in Him, but also to suffer for His sake.” Being united with Christ is being united with all of Him—His life, riches, graces, and His suffering! Paul said, “That I may know Him… and the fellowship of His sufferings, being conformed to His death” (Philippians 3:10). We are going to share in the suffering of Christ—persecution, rejection, and trials for His sake. Yet these produce eternal glory.
When facing trials, remember you are sharing in Christ’s sufferings with eternal reward ahead.
- Union with Christ Means Hope of Eternal Union with Him
Our union with Christ doesn’t end in this life; it continues to the life to come. Our being united with Christ in this life is to position and prepare us for the actual union—the eternal union with Him at the end of this present age, when He returns in full glory. This is the ultimate hope of we who believe—the reason why we can endure suffering for the sake of Christ in this life (1 Thessalonians 4:16–28).
Conclusion
The believers’ vital union with Christ is the foundation of Christian life. It is more than a doctrine—it’s a living relationship that changes everything.
By embracing these 10 powerful meanings that being united with Christ holds for us—new identity, sharing God’s life, access to God, inheritance in God’s family, righteousness, victory over sin, victory over the power of the devil, transformation by the Spirit, sharing in Jesus’s suffering, and hope of eternal union with Him—you can walk boldly, victoriously, and with hope in this life.
Never forget: You are not separate from Him. Christ lives in you, and you live in Him. As Jesus said, “Abide in Me, and I in you” (John 15:4, NKJV). This is the secret to a strong, fruitful, and unshakable Christian life.
EXTERNAL RESOURCES TO HELP YOU:
Ligonier Ministry – The ministry of R.C. Sproul
Union with Christ – Teaching Series by Sinclair Ferguson – A deeper exploration of how being “in Christ” shapes identity, assurance, and daily Christian living
TGC – The Gospel Coalition
Union with Christ: An Essay by Richard B. Gaffin, Jr. – Covers the biblical foundations and theological depth of union with Christ, highlighting its covenantal, eternal, and transformative dimensions.
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