Romans 8:11-16 – Christ In Us

The carnal mind is the natural mind we all had before salvation—ignorant of Christ’s truth. Even believers can operate carnally when they ignore what God has revealed. The spiritual mind belongs to those in Christ who have received the gospel. That knowledge changes our thinking, our eternal direction, and our daily walk if we allow it to. The carnal mind is enmity against God, and cannot submit to His law because it doesn’t understand or believe what God says.

The natural man, the man without Christ, operates entirely in this ignorance, but it’s possible for saved believers to operate in that same ignorance as well. As believers, we must learn these vital aspects of the two minds.

Romans 8:6–8 says those in the flesh cannot please God. Then verse 9 declares this glorious truth:

But ye 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.

Believers are not in the flesh but in the Spirit because the Spirit of God dwells in them.

If someone does not have the Spirit of Christ, he is not Christ’s. Salvation cannot exist without the gospel, without understanding, and without the Spirit. Upon believing the gospel, we receive the Holy Spirit (Ephesians 1:13). Hearing the word of truth, believing it, and trusting Christ results in being sealed with the Holy Spirit of promise. This sealing is not confirmed by feelings or outward appearance; it is known by faith in Scripture. 1 Corinthians 3:16 says believers are the temple of the Holy Ghost.

Romans 8:9 mentions the Spirit three times—the Spirit, the Spirit of God, and the Spirit of Christ—showing the emphasis on the Spirit’s indwelling. The Holy Spirit is distinct from our human spirit. Our inner man consists of soul and spirit: the soul is our identity, and the spirit is the God‑given capacity to know Him. Before salvation, the spirit is dead and without God’s truth. When we believe the gospel, our spirit is quickened and made alive. Proverbs 20:27 says,

The spirit of man is the candle of the LORD.

Along with this new life, the Holy Spirit—the third person of the Godhead—dwells in us. He’s not our spirit; He’s God Himself living in us. Only the Word of God discerns between soul and spirit, as Hebrews 4:12 says.

So when Romans 8:9 speaks of the Spirit, the Spirit of God, and the Spirit of Christ, these are not three beings but three names for the one God. Paul’s not formally teaching the Trinity here, yet the verse shows Father, Son, and Spirit together as one. If the Spirit of God dwells in you, you belong to Christ; if you do not have the Spirit of Christ, you are not His.

This shows Christ is God and that the Spirit given to believers is truly His Spirit.

The phrase “Spirit of Christ” is rare. It appears only twice in Scripture. It highlights the mystery of Christ in us. Colossians 1:26–27 speaks of this mystery, hidden for ages but now revealed: Christ in you, the hope of glory.

Ephesians speaks of believers being in Christ; Colossians speaks of Christ in believers. Romans 8:9 teaches the same truth, saying the Spirit of Christ dwells in believers, which is how Christ Himself dwells in them.

Christ is in heaven, yet He is also in believers through the Holy Spirit. The three are one, so the Spirit’s indwelling is Christ’s indwelling.

This is the fellowship of the mystery Paul describes in Ephesians 3: believers are in Christ and Christ is in them apart from Israel, covenants, and the law.

Romans chapters 5–8 teach that salvation is not by works or the law, but by the Spirit placing believers into Christ and indwelling them.

Without the Spirit, there’s no mystery, because the Spirit is the means by which Christ works in us. The Spirit testifies of Christ, applies His work to us, and unites us with His death and resurrection. We are crucified with Christ and raised with Christ because the Spirit has joined us to Him.

Romans 8 continues unfolding the glory of this mystery. Colossians calls it “the hope of glory,” and Romans 8 explains that glory in detail. Romans 8:10 says,

And if Christ be in you, the body is dead because of sin; but the Spirit is life because of righteousness.

This teaches the same mystery as Colossians 1:27— Christ in you, the hope of glory.

Paul shows this double truth, believers in Christ and Christ in believers, throughout his letters, which are the doctrine for the Church, the Body of Christ today.

Romans 8:9–10 says that if the Spirit of Christ is in you, then Christ is in you. The “Spirit of God”, the “Spirit of Christ”, and “the Spirit” all refer to the one God.

By Romans 8, the gospel’s already been taught—Christ died for our sins and rose again to give justification and eternal life (Romans 3–4). Romans 1:4 says He was declared the Son of God by resurrection because He was holy, blameless and sinless.

Romans 8:10 applies this to believers: if Christ is in us, our body is counted dead because of sin.

Even though we still live in mortal flesh, Scripture teaches in Romans 6:6 that our “old man” was crucified with Christ. His death becomes ours; His resurrection becomes our life.

Galatians 2:20 says, I am crucified with Christ… yet Christ liveth in me. Romans 7 describes the “body of this death,” and Romans 8 teaches that Christ’s death was our death and it frees us from condemnation.

This truth was not revealed before Paul.

Christ’s death was known as atonement for sin, but not as our death. Now His death and resurrection are personally ours. The Spirit of Christ dwelling in us is life because of righteousness—His righteousness, not ours. Romans 6:8 says that if we are dead with Christ, we shall also live with Him.

1 Corinthians 12:13 says believers are baptised by one Spirit into Christ’s body. When we trust the gospel—that Christ died for our sins, was buried and rose again— the Spirit indwells us, unites us with Christ, and imputes or accounts His righteousness to us. It’s not by our works.

Romans 1–4 proved we can’t earn righteousness. Life comes from the Spirit because Christ’s righteousness is imputed by faith. Without the Spirit of Christ, there is no righteousness and no life—only condemnation. Romans 5:1 says we’re justified by faith and have peace with God, and Romans 5:5 says the love of God is shed abroad in our hearts by the Holy Ghost.

The Spirit seals and identifies believers as members of Christ’s body, meaning that being part of the body of Christ is not just a hope or a symbol—it’s a real spiritual position. Christ died in His body, and because He dwells in us, our body is counted dead with His death. His life is now our life, and His Spirit works with our spirit. This is something the old covenant never provided.

Romans 8:4 says the righteousness of the law is fulfilled in those who walk after the Spirit. This is not Deuteronomy‑style law‑keeping, but because Christ fulfilled the law and His righteousness is imputed to us. Jesus said in Matthew 5:17 that He came not to destroy the law but to fulfil it.

Romans 5:21 says,

That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.

Grace reigns through righteousness unto eternal life. Grace reigns today—not Christ sitting on a kingdom throne judging nations, but Christ offering salvation to ungodly sinners because His righteousness is freely given.

Romans 8 teaches how to live in that grace. Verse 10 says, If Christ be in you, the body is dead because of sin, but the spirit is life because of righteousness.

Romans 7 showed Paul’s struggle: sin dwells in the flesh, and the flesh cannot perform righteousness. The answer is not trying harder to do and be better but the Spirit dwelling in us and giving us a new source of life and power.

Now Romans 8:11 deals with our mortal bodies. It says,

But if the Spirit of him that raised up Jesus from the dead dwell in you, he that raised up Christ from the dead shall also quicken your mortal bodies by his Spirit that dwelleth in you.

This doesn’t remove sin’s presence now, but gives spiritual life and future resurrection. Until glory, believers carry both truths: sin dwells in the flesh, and the Spirit dwells in us. The Spirit is God’s provision for living before the resurrection.

Unlike the Old Testament, where the Spirit came upon people temporarily, the Spirit now permanently dwells in every believer and seals us, as 2 Corinthians 1:22 says,

Who hath also sealed us, and given the earnest of the Spirit in our hearts.

He identifies us with Christ and empowers us to walk after the Spirit. 1 Corinthians 3:16 says believers are the temple of God. 1 Corinthians 6:19 says our body is the temple of the Holy Ghost.

Romans 8:11 begins saying, “If the Spirit of him that raised up Jesus from the dead dwell in you…”

This shows the Godhead: the Spirit, the Father, and Christ. Scripture teaches all three raised Jesus (1 Peter 3:18; Galatians 1:1; John 2:19; John 10:17–18).

These passages reveal the unity of the Godhead.

The same Spirit will “quicken our mortal bodies”. Romans 7 shows Paul’s struggle; sin dwells in his flesh, and no good thing is in him.

He wants to do good but can’t perform it. Sin remains present until glory, but the Spirit provides life and power now.

This indwelling of the Holy Spirit is different from the Old Testament, where the Spirit came upon certain people temporarily, for a specific purpose. Now, today, in the dispensation of grace, the Spirit permanently dwells in every believer, providing life now and resurrection later.

He is the earnest of God’s promise. “The Earnest” means the Lord’s pledge, the Lord’s token, His covenant, and His guarantee. It’s the irreversible evidence of His faithfulness, as 2 Corinthians 1:21–22 tells us.

2 Timothy 1:13–14 shows the Spirit’s ministry is tied to sound doctrine. The Spirit keeps us, teaches us, and strengthens us to walk after the Spirit rather than the flesh; our part is “knowing” it.

Romans 8 ties this together: Christ died for sin, and our mortal body will die because of sin. But the Spirit who raised Christ dwells in us, guaranteeing our resurrection. Romans 8:18 says present sufferings cannot compare to the glory to be revealed. Romans 8:23 says we wait for the redemption of our body. 2 Corinthians 5 teaches the same: we groan in this mortal tabernacle, longing for immortality, and the Spirit is the earnest of that promise.

Christ finished His work and is now in heaven. The Spirit unites believers to Him, places them in His body, and will raise them as He raised Christ. The Spirit’s quickening of the mortal body is future, but He also affects our present walk by opening the Word to us. 1 Corinthians 6 says our body is for the Lord, not for sin. We’re bought with a price, so we glorify God in our body. The Spirit’s indwelling means our body matters in service, even though it remains mortal and weak.

Paul warned in Romans 6:12 that believers can let sin reign in their mortal flesh.

1 Corinthians 9:27 shows Paul disciplining his body so he could minister. He wasn’t perfect, but the Holy Spirit strengthened his inner man, enabling him to use his body for service. It was an inside-to-outside process. Strength to resist the flesh doesn’t come from trying harder; it comes from the Spirit’s work within.

The Spirit dwells in us, and Scripture is the lens through which we see His work.

God’s Word strengthens the inner man so the believer can bring the body into obedience. Without that change happening within, the Word working in us, the outward walk will not change. 1 Thessalonians 5:23 shows Paul praying that the believer’s spirit, soul, and body be preserved blameless. Though the flesh will die and later be glorified, it is still the Spirit’s temple now and should be used for God’s glory.

Sanctification is God’s will, says 1 Thessalonians 4:3. The Spirit sets believers apart in Christ. That’s what sanctification means, but walking in that sanctification requires acknowledging the truth and letting His Word, the Word of truth, work in us.

1 Timothy 3:14–16 calls this the “mystery of godliness”—God manifested in the flesh, justified in the Spirit, preached to the Gentiles, received into glory. Believers walk godly lives the same way: by Christ in them, by the Spirit dwelling in them, and by the truth of the mystery strengthening their inner man so they can serve God even in mortal flesh.

Many know how to walk after religion or the flesh, but not after the Spirit. Romans 8 teaches this walk.

Romans 8:12–13 teaches this,

Therefore, brethren, we are debtors, not to the flesh, to live after the flesh.

For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.

We are debtors, but not to the flesh.

If we live after the flesh, we die; but through the Spirit we mortify the deeds of the body and live. Because the Spirit dwells in us—sealing, sanctifying, keeping, and identifying us with Christ—we owe nothing to the old man of sin. The flesh once gave us physical life, but now, true life is found only in the Spirit.

Cultural ideas like “you owe it to yourself” or “you only live once” assume the flesh is the centre of life, but eternal life in Christ means we’re not indebted to our mortal body. Life is in the Spirit, not in temporary earthly experiences.

Unbelievers try to make the most of life through fun, amusement, or worldly goals such as the pursuit of wealth or well-being, never questioning life without God. It’s the Romans 1 pattern of serving creation, the creature, more than the Creator.

True life is found only in Christ and the Spirit. The world sees devotion to God as wasted time, but Scripture says all flesh is dying; only the Spirit gives life.

The Spirit dwells in us, but Scripture’s the instrument that reveals His work. God’s Word strengthens the inner man so the believer can bring the body into obedience.

Though the flesh will die and be glorified later, it is still the Spirit’s temple now and should be used for God’s glory.

Walking in sanctification, which is God’s will according to 1 Thessalonians 4:3, requires knowing the truth and letting the Spirit’s Word work in us. We owe nothing to the old man or its desires. The flesh is dying; life is in the Spirit. Eternal life means we don’t “only live once.” We live forever. The world says devotion to God is a waste, but Scripture says true life is only found in Christ.

We also owe nothing to religion. Religious leaders who can’t keep the law themselves and fail to live the life they demand of others pressure us to follow dead systems rising from false or doubtful doctrine. Paul says, “God forbid that I should glory, save in the cross of our Lord Jesus Christ” (Galatians 6:14). The cross declares justification is free. Religion resists this because free grace removes its control.

2 Corinthians 5:14–15 says Christ died for all so believers should live for Him, not for themselves or for the flesh or religion. Romans 8:13 makes it a life‑and‑death issue: living after the flesh results in death, but through the Spirit we mortify the deeds of the body and live. Mortifying the flesh is impossible by willpower; Romans 7 proves that. Only the Spirit enables true change.

Walking after the Spirit means letting His, the Spirit’s, revealed truth reshape our mind by knowing who we are in Christ, what He has done.

This is the “mind of Christ.” Galatians 6:8 says sowing to the flesh reaps corruption, but sowing to the Spirit reaps life. We sow to the Spirit by hearing His words, learning sound doctrine, and seeking spiritual understanding. We sow to the flesh when we disregard the Spirit and try to use nature, self‑fulfillment, or religious performance to understand life. Life is found only in Christ, by the Spirit, through God’s Word.

Romans 8:13 that we just read is not a salvation verse. Justification never depends on deeds. Paul’s describing how we live now we’re saved, not how we’re saved. Through the Spirit we mortify the deeds of the body, and then we live—experiencing the freedom and lack of condemnation belonging to those who walk after the Spirit.

Romans 8:13 ends with “ye shall live.” We often overlook this because we’re already physically alive, but this is the great promise of the gospel. Humanity’s greatest enemy is death. Sin brought death into the world. Now Paul says, through the Spirit, ye shall live. Romans 8 will expand this until declaring that nothing can separate us from God’s love and that we are “more than conquerors” (Romans 8:37). “Ye shall live” means sin and death cannot destroy the believer.

If someone told us that we’d never had to worry about money again, we’d feel relief. Paul says something far greater: we never have to fear death or condemnation. Our body will die, but we have eternal life because Christ died for our sins and rose again. Because our flesh is destined to die, we owe it nothing. It’s been crucified with Christ and will perish, but we live in Christ.

This is why Romans 8 is so glorious. Life is lived through the Spirit, not the flesh.

We will live eternally in glory, and no accusation can overturn that.

Now to Romans 8:14

For as many as are led by the Spirit of God, they are the sons of God.

There’s the “For” again, tying into the last verse.

Being led by the Spirit is not mystical feelings, dreams, impulses, or human intuition. Many Christians claim “the Spirit led me”, but it’s simply their flesh or their desires. Same as “Gold told me.” No, not unless it was through the study of His Word!

Paul constantly speaks of walking after the Spirit. “Walking after” in this context means following a course laid out before us. Scripture shows two courses: the course of the flesh, which follows the world (Ephesians 2:2), and the course of the Spirit. To be “led by the Spirit” refers to the path the Spirit lays out—His instruction, His revealed truth, His direction. Walking after the Spirit means following that course.

It’s not mystical feelings or impulses. It’s the Spirit saying, “Here’s the truth, here’s what Christ has done, here’s who you are,” and us choosing to follow the course of, or to walk after, that truth. The Spirit lays the map; we follow it.

That’s being led by the Spirit, and hearing what the Spirit says. The Spirit revealed truth to Paul, Paul wrote it down, and believers now have those Spirit‑given words in Scripture.

When Paul says Ephesians 3:4–5, “when ye read, [that’s his letters] ye may understand my knowledge in the mystery of Christ”, he shows that the Spirit’s leading comes through words, not feelings. The Spirit revealed the mystery; reading Scripture is how believers hear Him. We cannot walk after the Spirit unless we first understand the course He laid out in the written Word.

Ephesians 3:16 says the Spirit strengthens the inner man. Colossians 1:9 says this strengthening comes through spiritual understanding and knowing God’s will. Ephesians 4 speaks of the unity of the Spirit—unity around truth. Ephesians 5:18 commands believers to be filled with the Spirit, and the next verse explains how: speaking psalms, hymns, and spiritual songs—truth shaped by Scripture. Ephesians 6:17 calls the Word of God “the sword of the Spirit.” The Spirit leads through Scripture and never bypasses it.

This changes how we think and therefore, how we live follows almost automatically. Before the revelation of the mystery, people tried to change who they were by what they did. But Scripture shows deeds cannot change identity. Only God can make us sons. When He does, we begin to think differently. We no longer see ourselves as hopeless sinners but as renewed by God. That new identity shapes our walk.

Romans 8:15 contrasts two spirits: the spirit of bondage and the Spirit of adoption.

Let’s read,

For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.

Bondage is being overcome by sin, law, or fear of death. Israel lived under bondage to the law, and the world lives under bondage to sin. But believers have received the Spirit of adoption, by whom they cry, Abba, Father. This is confidence, not fear. It’s the Spirit testifying that we belong to God.

Israel had covenants promising sonship, as Romans 9:4 tells us, but Gentiles did not. Yet now, through Christ, both Jew and Gentile become sons of God without law, covenants, or works. This is the mystery revealed to Paul: God creates sons by grace through faith, by the Spirit.

Being a son changes how we think. What we do can’t change who we are, but who we are can change what we do.

If we think of ourselves only as sinners, we’ll live like sinners. But if we understand that God has made us sons—justified, sanctified, and washed—we begin to live from that identity. We’re not in bondage; we’re sons of God, indwelt by the Spirit, destined for glory.

Paul warns believers not to be pulled back into the world’s “wisdom,” which mocks Scripture as anti‑intellectual. Colossians 2:8 says philosophy can deceive because it offers the appearance of wisdom while ignoring God’s truth. Real wisdom begins with knowing God, His will, and His Word. Romans 8 teaches us to walk after the Spirit, not after the flesh, which is the world’s course. In Christ are hidden all the treasures of wisdom and knowledge, so trusting what God says—even before fully understanding it—is faith, not ignorance.

Colossians 2:18 warns against being puffed up by a fleshly mind, thinking we’re something we’re not or that we know more than most. The answer is a spiritual mind, which comes only from knowing the things of the Spirit revealed in Scripture. Without Paul’s epistles and the revelation of the mystery, believers cannot know spiritual truth. Galatians 2:4 shows how false teachers try to bring believers into bondage by adding fleshly requirements, but liberty in Christ is freedom from sin, death, law, covenants, and circumcision. Bondage comes through the flesh; liberty comes through the Spirit.

Galatians 4 explains adoption.

A child, though he may be an heir, is under tutors until maturity. Humanity was once under the elements of the world, under law, and under bondage. But when the fullness of time came, God sent His Son to redeem those under the law so we might receive adoption. Adoption means being placed as a full son with rights and inheritance. Romans 8:15 says we have not received the spirit of bondage but the Spirit of adoption, crying “Abba, Father.” This is full sonship. Because we’re sons, God sends the Spirit of His Son into our hearts. We’re no longer servants but sons—and if sons, then heirs of God through Christ.

Galatians 4:9 warns believers not to return to weak and beggarly elements—law, rituals, circumcision, religious bondage. We’re sons of God, indwelt by the Spirit, freed from bondage, and destined for glory. Walking after the Spirit means living from that identity and refusing to return to the old bondage of the flesh or the world’s wisdom.

If a person walks into a church and simply believes the gospel—that Christ died for their sins and rose again—they’re immediately a son of God. No rituals, no walking down an aisle, no religious performance. Many would hear that, say “I’m secure now,” and walk right back out the door. And that raises the real question: If salvation is complete, why do Christians gather? Why do anything at all?

Paul answers: life is about faith. God wants people to trust Him. He can’t force love or faith; He gives grace freely, and people must freely receive it. Salvation today is simply believing what Christ did. Christ accomplished everything; we receive it by faith. Once we believe, the goal is accomplished—we’re saved, sealed, and made sons of God. Nothing else is required.

Then, Romans 8 teaches that the rest of our life is not about earning anything from God. It is about learning the mind of Christ and walking after the Spirit so we can avoid the condemnation of failing to live perfectly that we saw in Romans 7.

We mortify the deeds of the flesh not to get or to keep salvation, but because the flesh always tries to rise up and say, “I must do something to prove myself.” Paul says no—Christ did it all. Mortifying the deeds of the body means living through the Spirit and the knowledge of what He’s made us.

Many Christians fall into the trap of thinking that after salvation, God now wants them to perform religious works to become “better Christians.” But ministry and good works only have value when they flow from gratitude, love, and the Spirit working in the inner man—not from trying to earn standing with God.

We can praise God for His grace even if we never accomplish anything impressive in the flesh, but it is better to let the Spirit strengthen our inner man so fruit appears.

Galatians 4 calls this the Spirit of adoption. We’re not under weak and beggarly elements anymore. God’s not begging us for more works. Once we believe the gospel, He says “finished.” You shall live. Eternal life is settled. If we sin—we shall live. If our body fails—we shall live. This truth disrupts every religious system that demands human performance to satisfy a demanding God.

Galatians 5:1 says, Stand fast in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage. Bondage is the idea that we need to do something to earn God’s acceptance. But we’re not servants under law—we’re sons, adopted with full rights. Romans 8:17 says we’re joint‑heirs with Christ.

The Holy Spirit in us is not the spirit of fear. Fear comes from law, sin, and death. The Spirit gives power, love, and a sound mind (2 Timothy 1:7). Power comes from the gospel and the Spirit’s indwelling. Love comes from Christ’s sacrifice. A sound mind comes from the Word of God—the mind of Christ.

Paul says the Spirit of adoption means we have the Holy Spirit and are now sons of God, able to cry “Abba, Father.” Abba is Aramaic for Father, and Scripture gives the translation. Jesus used the same phrase in Mark 14:36 when He prayed in Gethsemane. Because we’re baptised into Christ—into His death, resurrection, and sonship—we share His position before the Father.

Romans 8:16 says,

The Spirit itself beareth witness with our spirit, that we are the children of God:

This witness is not a feeling or an inner voice. It’s the Spirit’s testimony through the written Word. The Holy Spirit is not our spirit; He indwells us and informs our spirit through Scripture. Everything Paul’s been teaching—Christ’s work, the Spirit’s indwelling, our new identity—comes from the Spirit’s revealed words.

Galatians 3:26 says we’re children of God by faith in Christ Jesus. Romans 8 says we’re sons if we’re led by the Spirit. These are not two different ideas. Faith comes by hearing the Word of God, and the Word was revealed by the Spirit. God doesn’t implant faith into us apart from His Word; He gives faith through hearing what the Spirit has revealed.

The Spirit reveals the things of God (1 Corinthians 2:10). He revealed truth to Paul, and Paul wrote it down. Holy men spoke as they were moved by the Holy Ghost, and Scripture is God‑breathed. The Bible is the Spirit’s written witness. When we believe what it says about Christ, we know we’re sons of God. Ephesians 3:6 says we’re fellow‑heirs. Ephesians 5:2 calls us “dear children.” Ephesians 5:8 says we’re “children of light.” All these verses testify—by the Spirit—that we belong to God.

This is the Spirit’s witness: not feelings or impressions, but the Spirit’s own words in Scripture declaring that we’re God’s children, justified by grace, indwelt by the Spirit, and destined for glory.

In the next episode, Romans 8 will go on to explain what this inheritance means for our life and our hope. We’ll start at Romans 8:17, which is the rest of the thought in Romans 8:16. It says,

And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.

We’ll learn what that means, if so be that we suffer with him, that we may be also glorified together.

Until then, may God give you the knowledge of who you really are now that you have believed.