United to Christ: The Hidden Key to Salvation (Ephesians 2)

Sermon from the Momentum channel (The Nature and Purpose of Salvation, follow up and application (2)), Text: Ephesians 2:1-10

"You were dead in your trespasses and sins... But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ (by grace you have been saved), and raised us up with him, and seated us with him in the heavenly places in Christ Jesus."
Ephesians 2:1-6

Did you know there is a biblical truth so central that, without it, no salvation could stand: being united to Christ? The preacher of this message tells it himself: after more than two thousand books collected by his father and himself, he had never found a single volume devoted to this theme. One week of intense study was enough for him to say that this truth had transformed his fifty six years of Christian life. This article invites you, in turn, to receive what struck him so deeply: why union with Christ is the hidden key to salvation according to Ephesians 2:1-10.

1. Why We Need to Be United to Christ

Before celebrating union with Christ, we have to look the truth in the face: our starting condition. Ephesians 2:1-3 makes no attempt to flatter you. The text is categorical: you were a spiritual corpse. Not sick, not weak: dead.

"And you were dead in the trespasses and sins in which you once walked, following the course of this world, following the prince of the power of the air, the spirit that is now at work in the sons of disobedience." (Ephesians 2:1-2)

1.1 A Corpse Unable to Respond to God

The Greek word translated "dead" can also be rendered "corpse." You cannot respond to a spiritual stimulus when you are a corpse. You cannot seek God on your own, you cannot recognize your own sin, you cannot even repent of it. Ezekiel says the same thing, in a picture: "These bones are very dry" (Ezekiel 37:2). That is what you were before Christ: dry, spiritually blind, unable to initiate the slightest movement toward God.

1.2 Three Powers That Held You

Paul then describes three forces that ruled over that corpse.

a) The course of this world. The "world," in this passage, refers to what refuses God, what hates him: "If the world hates you, know that it has hated me before it hated you" (John 15:18). Jesus also spoke of "this evil and adulterous generation" (Matthew 12:39). The word rendered "course" also carries the idea of stretched out time: generations upon generations built up this refusal, and you inherited it.

b) The prince of the power of the air. This is Satan. Paul calls him elsewhere "the god of this age" who "has blinded the minds of unbelievers, to keep them from seeing the light of the gospel" (2 Corinthians 4:4). The verb "at work" used in Ephesians 2:2 comes from the same root as our word "energy": Satan exerts a real force to keep souls far from the gospel.

c) The desires of your flesh. "We all once lived among them in the passions of our flesh, carrying out the desires of the body and the mind" (Ephesians 2:3). The Greek is emphatic: this had become your way of life, your default setting. You did not follow the world and Satan reluctantly: you found pleasure in it. Paul confirms this: "The mind set on the flesh is hostile to God" (Romans 8:7).

1.3 Children of Wrath by Nature: Not by Accident

The end of verse 3 is chilling: "we were by nature children of wrath." The Greek word for "children" here is different from the one in verse 2. Here it refers to a child intimately tied to its parents, one who inherits naturally. In other words: this nature that rebels against God did not come to you along the way. It was in you before you were born. David had already said as much: "Behold, I was brought forth in iniquity, and in sin did my mother conceive me" (Psalm 51:5). And Romans 1:32 adds that people not only do evil, they "give approval to those who practice them."

Remember this: without divine intervention, you were utterly lost. That is why you needed to be united to someone else, not improved, but united to Christ.

2. But God... The Words That Change Everything

Two small words in verse 4 reverse the whole trajectory: "But God." You were in no position to reach out your hand. God, for his part, bent down. His rich mercy, his great love, his grace: all of it came from his side, not from yours.

"But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ." (Ephesians 2:4-5)

2.1 Three Verbs Joined to "With Christ"

Look closely: Paul uses three verbs that all begin with "with Christ." God made you alive with Christ (v. 5), raised you up with Christ (v. 6), seated you with Christ in the heavenly places (v. 6). You are not saved alongside Christ, nor thanks to Christ from a distance: you are saved in Christ, united to him.

That is what union with Christ means: his death has become your death to sin, his resurrection your resurrection, his place in heaven your present standing. Your record is no longer written on its own: it is stitched to Christ's.

2.2 From Adam to Christ: A Change of Identity

Before, you were united to Adam. In Adam, all die (1 Corinthians 15:22). You inherited your rebellious nature from him. Now, you are united to Christ. In Christ, all will be made alive. You no longer share Adam's guilt: you share Christ's righteousness. This is not an accessory to salvation. It is salvation itself.

2.3 Not by Your Works, by Grace Alone

Paul drives the point home: "For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast." (Ephesians 2:8-9). Nothing that made you a living being came from you. You did not even supply the faith: it is a gift. If you are ever tempted to feel like a model Christian, go back and read 2:1-3 and 2:8-9.

3. You Are His Workmanship: Prepared in Advance

"For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them." (Ephesians 2:10)

The Greek word translated "workmanship" is where we get our word "poem." You are a work of art made by God. Not because you worked hard on yourself: because God remade you from scratch in Christ. And the good works you will produce do not serve to save you: they are the visible proof that you have been saved.

These works, God has "prepared beforehand." You are already walking a path marked out by him. Your responsibility is not to invent everything: it is to remain united to Christ and to let what he has placed in you come out.

4. Two Hopes Tied to Your Union with Christ

If you are truly united to Christ, two realities should shape your daily horizon.

4.1 Christ Lives in You Now

Paul sums it up like this: "Christ in you, the hope of glory" (Colossians 1:27). You did not simply receive a status: the risen Christ is present in you by his Spirit. What used to fill you (the values of the world, the appetites of the flesh) has been replaced. It is not your efforts that shifted your center of gravity: it is God.

Peter wrote to Christians who had never seen Jesus: "Though you have not seen him, you love him. Though you do not now see him, you believe in him and rejoice with joy that is inexpressible and filled with glory, obtaining the outcome of your faith, the salvation of your souls" (1 Peter 1:8-9). This joy is not an emotion you have to manufacture: it is the consequence of a real union.

4.2 Christ Will Return to Get You

The second hope is future: "to wait for his Son from heaven, whom he raised from the dead, Jesus who delivers us from the wrath to come" (1 Thessalonians 1:10). The Greek verb for "wait" holds three ideas together: patience, hope, and continuity. A literal rendering would be: you wait for Christ with hope, with patience, without ever letting go.

Paul tells the Romans that even we, who have the firstfruits of the Spirit, "groan inwardly as we wait eagerly for adoption as sons, the redemption of our bodies. For in this hope we were saved" (Romans 8:23-25). The gospel runs backward compared to the world: the world hopes for what it can see, faith hopes for what it cannot yet see.

4.3 What These Two Hopes Produce in You

John writes: "Everyone who thus hopes in him purifies himself as he is pure" (1 John 3:3). Waiting for Christ does not lull you to sleep: it sanctifies you. When you remind yourself every day that Christ lives in you and that he could come at any moment, you ask yourself: "What would he find if he found me right here, right now, in this reaction, in this thought, in front of this person?"

When the temple curtain was torn in two from top to bottom (Matthew 27:51), something enormous was being declared to you: where only the high priest could once enter, once a year, you are now the place where God resides. You are the temple. This union is already a reality; it will be visible forever when Christ returns to get you, in a glorified body, face to face.

Key Takeaways

• Before Christ, you were a spiritual corpse, not a weak believer, not someone sick: a dead person. You could initiate nothing toward God.
• "But God" reversed everything. Mercy, love, and grace came from his side. You are saved by grace, through faith, which is itself a gift.
• To be saved is to be united to Christ: alive with him, raised with him, seated with him in the heavenly places. This is the heart of salvation, not an accessory.
• You are his workmanship. Good works do not save you: they prove that you are saved, and God prepared them beforehand.
• Two hopes sustain your walk: Christ lives in you now, and Christ will return to get you. Together, they purify you.

Personal Application

1. Do I truly remember that, without Christ, I would today be a spiritual corpse? Or do I live as though my salvation were earned?
2. In what area of my life am I still acting as though I were united to Adam rather than to Christ?
3. Does the fact that Christ lives in me now show up in a joy the world cannot manufacture?
4. If Christ returned today, in what thought, what reaction, what relationship would he find me? What do I need to change this week?
5. Am I walking in the good works God has prepared for me, or am I inventing a parallel path?

Verses Cited

• Ephesians 2:1-10
• Ezekiel 37:2
• John 15:18
• Matthew 12:39
• 2 Corinthians 4:4
• Romans 8:7
• Psalm 51:5
• Romans 1:32
• 1 Corinthians 15:22
• Colossians 1:27
• 1 Peter 1:8-9
• 1 Thessalonians 1:10
• Romans 8:23-25
• 1 John 3:3
• Matthew 27:51

FAQ

Union with Christ: is it an image or a reality?

A reality. Paul uses three concrete verbs (made alive, raised, seated in the heavenly places), all "with Christ." This is not a poetic metaphor: it is your legal and spiritual standing before God, from the day you passed from death to life.

If God does all the work, what is the point of faith?

Faith is the means by which you receive grace. It is itself a gift from God (Ephesians 2:8). You do not activate your salvation through faith: through faith you welcome what God has already accomplished in Christ. That is why no one can boast.

How do I live out this union with Christ day to day?

By reminding yourself every morning that Christ lives in you and that he could return today. This double awareness (his presence within you and his imminent return) drives you toward holiness, not out of pressure but out of gratitude. Walk in the good works God has prepared beforehand for you (Ephesians 2:10).