Is union with Christ the foundation of all soteriological blessings, or one blessing among several?

Question 7093

Union with Christ is the most frequent way the New Testament describes a Christian, and one of the least discussed in ordinary church life. Paul uses the phrase in Christ, or its equivalents, well over a hundred times. It is his shorthand for what a believer is. Yet ask most Christians to explain it and you will get a pause, followed by something vague about closeness to Jesus.

The question worth asking is whether this is one blessing sitting alongside justification, regeneration and sanctification, or whether it is the reality within which all of those take place. My answer is the second, and I think it makes a considerable difference to how the whole of salvation hangs together.

What the New Testament Means by In Christ

The phrase is not devotional decoration. When Paul says there is now no condemnation for those who are in Christ Jesus (Romans 8:1), the in Christ is carrying the logic of the sentence. The reason there is no condemnation is not that God has decided to overlook things but that the believer is located in Someone against whom no charge stands. Position determines verdict.

The same structure appears everywhere. God has blessed us with every spiritual blessing in the heavenly places in Christ (Ephesians 1:3). If anyone is in Christ, he is a new creation (2 Corinthians 5:17). We were baptised into His death and raised with Him (Romans 6:3-5). In each case union with Christ is not one item on the list; it is the address at which the whole list is delivered.

Union with Christ as the Root of Justification

Justification is a declaration made about a person, and the question is always on what basis. The answer Scripture gives is that the believer is reckoned righteous because of what Jesus did and because the believer is joined to Him. Paul’s argument in Romans 5 turns on representation: as all who are in Adam share his condemnation, all who are in Christ share His acquittal. Take away the union and imputation becomes a legal fiction with nothing underneath it.

This is why union with Christ is not in competition with justification by faith. Faith is the means by which a person comes to be in Christ, and being in Christ is why the verdict falls as it does. The order is not justification then union, nor union then justification as two separate transactions, but a single moment in which the believing sinner is joined to Jesus and therefore declared righteous.

Union with Christ as the Engine of Sanctification

Romans 6 is the great passage here, and it is striking that Paul answers a question about sin with a statement about identity rather than a set of techniques. Why should we not continue in sin? Because we died with Him and were raised with Him, and to go on living in sin would be a contradiction of what we now are. Holiness flows from position, not the reverse.

This is why moralistic preaching fails so consistently. Telling a believer to try harder addresses the will without addressing the identity that alone can sustain the effort. Paul tells us to consider ourselves dead to sin and alive to God in Christ Jesus (Romans 6:11), which is a call to reckon on something already true. Anyone working through how sanctification actually proceeds will find that union is doing the heavy lifting.

It also explains the presence and work of the Spirit in the process. The Spirit who indwells the believer is the Spirit of the risen Jesus, and His sanctifying work is the outworking in experience of what union with Christ has already made true in position.

Is It a Separate Category or the Governing One?

Those who treat union as one blessing among others usually do so to protect justification from being swallowed by an emphasis on mystical participation, and that concern is legitimate. There are traditions in which union language has been used to blur the forensic clarity of justification until the believer no longer knows whether he stands on the finished work of Jesus or on his own transformation.

But the remedy is not to demote union; it is to define it. Union with Christ does not dissolve the distinctions between justification, adoption, sanctification and glorification. It supplies the ground on which each stands. The believer is justified in Christ, adopted in Christ, being sanctified in Christ, and will be glorified in Christ. Keeping the distinctions sharp while recognising the common root is the way to hold both concerns together.

What Union Does Not Mean

It does not mean absorption. The believer does not become divine, and the distinction between Creator and creature is never breached. Nor does it mean that my personality is erased or that my choices cease to be mine. The New Testament addresses believers throughout as responsible people who must obey, resist and press on.

Neither does it mean that union is something I achieve by intense experience. It is not the reward of advanced spirituality. Every believer in Corinth, including the ones Paul had to rebuke sharply, was in Christ. Union is objective and universal among the saved, which is precisely why it can function as the basis of both assurance and exhortation.

How Union Steadies Assurance

If my security depended on the strength of my grip, it would be a fragile thing. But the language of union puts the believer inside Someone else. Paul says your life is hidden with Christ in God (Colossians 3:3). To reach me, judgment would have to reach Him first, and it will not.

This is one reason I keep returning to union when someone is struggling with confidence before God. Feelings fluctuate and obedience is uneven, but the question of whether I am in Christ was settled at the moment of faith. Alongside the wider biblical picture of union, this is the most stabilising thing I know to say to a shaken believer.

Living Out of Union Rather Than Towards It

The practical shift is from trying to reach a place to living from one. Most of us instinctively organise the Christian life as a journey towards acceptance. Union with Christ says the acceptance is already the ground under our feet, and the journey is the working out of what is already ours.

That is not a licence for slackness. Nobody who genuinely grasps that they are joined to Jesus treats sin lightly, which is exactly Paul’s point in Romans 6. But it does change the atmosphere of obedience from anxiety to gratitude, and obedience offered out of gratitude lasts a great deal longer than obedience offered out of fear.

Union with Christ and the Local Church

There is a corporate dimension that individualistic readings miss entirely. Paul’s favourite image for the church is a body, and the reason a body works as an image is that every member is joined to the same Head. Union with Christ therefore produces union with one another, which is why Paul can settle a quarrel in Corinth by reminding the parties who they belong to.

This has practical bite. If the person irritating me on Sunday morning is in Christ, then my relation to them is not a matter of temperament or preference. We are joined to the same Person, and Paul treats division as a kind of dismemberment. Anyone who takes union seriously will find it very difficult to treat church membership as optional.

Baptism and the Lord’s Supper as Signs of Union

The two ordinances both dramatise union with Christ. Baptism pictures burial and resurrection with Him, which is exactly how Paul explains it in Romans 6:3-5. The Lord’s Supper sets before us the body and blood in which we participate, and Paul uses the word for sharing or having in common to describe it.

That is worth noticing, because the ordinances are often reduced to memorials of an event rather than declarations of a relationship. They do commemorate. They also announce, week by week and convert by convert, that Christians are people who are in Someone. The signs would be unintelligible without the union they signify.

So, now what?

Try reading Ephesians 1 and marking every occurrence of in Christ, in Him, in whom. By the end of the chapter the cumulative effect is difficult to miss: everything Paul is celebrating comes to us at one address. If you have been treating union with Christ as a piece of advanced theology rather than the ground you stand on daily, that chapter is the place to start. What would change in your battle with a familiar sin if you began from what you already are rather than what you are trying to become?

“I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me.” Galatians 2:20