In today’s society, identity has become increasingly defined by feelings and appearances rather than by objective truth. This confusion is not limited to gender or race but has also affected how people understand Christianity. Many assume that if someone looks, talks, and behaves like a Christian, then they must be one. This superficial approach resembles the so-called “duck test”—if it looks like a duck and quacks like a duck, it must be a duck. However, Christianity is not a matter of behavior or outward appearance. It is about life—eternal life that comes from God through faith in Jesus Christ. The true mark of a Christian is not church attendance or moral conduct but whether they have the indwelling life of the Holy Spirit. As John 3:16 emphasizes, eternal life is given to those who believe, not those who merely act the part.
Romans 8 powerfully distinguishes between those who are truly alive in Christ and those who are still spiritually dead. The apostle Paul outlines four contrasts in this passage: being in the flesh versus being in the Spirit, having the Spirit versus not having Him, being dead versus being alive, and belonging to Christ versus not belonging to Him. These contrasts reveal a binary reality: one is either saved or unsaved. There is no in-between. Christianity is not a sliding scale of righteousness or performance; it is a condition of being—either indwelt by the Spirit of God and alive or outside of Him and dead. The presence of the Holy Spirit in a person’s life is the defining evidence of true salvation.
To be “in the Spirit” is far more than a metaphorical statement. It represents an intimate, spiritual union with God. Jesus described this kind of unity in His relationship with the Father, saying, “I am in the Father and the Father is in Me.” This mutual indwelling reflects the deep, mysterious relationship within the Trinity, and Jesus prayed that believers would share in that same union. Being a Christian means more than following teachings; it means being united with the Triune God. Through Christ’s death and resurrection, we have been brought into this divine relationship. We are not merely followers or servants—we are God’s children, adopted and made new through His Spirit.
This union is made possible by the indwelling of the Holy Spirit. Paul makes it clear: if anyone does not have the Spirit of Christ, they do not belong to Him. This truth dispels common misconceptions that equate emotional religious experiences or speaking in tongues with the presence of the Spirit. Instead, the Spirit’s indwelling marks a change in ownership and identity. We no longer belong to ourselves or to sin but to God. Our bodies become temples of the Holy Spirit, and we are liberated from the law of sin and death. Belonging to God means living under His love, protection, and lordship.
Although our physical bodies are still subject to decay and death due to sin, our spirits have been made alive through the righteousness of Christ. Romans 8:11 assures us that just as God raised Jesus from the dead, He will also give life to our mortal bodies through His Spirit. This resurrection is both spiritual and physical. The new life we have in Christ begins in the spirit, unseen but real. While we may not fully grasp or feel this transformation now, Scripture promises that we will one day see its fullness. Our current struggles and limited understanding do not negate the life we have; rather, they remind us that the best is yet to come.
This new life is accessed and sustained by faith, specifically, faith in Jesus Christ. Many people have faith in various things, but it is not faith itself that saves; it is the object of that faith that matters. Only faith in Christ, the Son of God, has the power to justify and give life. It is not the intensity or size of our faith that brings salvation, but the fact that it is rooted in the right person. Through faith, we are justified, reconciled to God, and indwelt by the Spirit. This grace transforms us from spiritual death to abundant life in Christ, a life that is rich not because of external blessings but because of our union with God.
The Christian life is deeply fulfilling because it is lived in relationship with the Triune God. This life does not depend on wealth, comfort, or worldly success but on knowing and being known by God. Scriptures such as Psalm 84, Ephesians 1, and John 15 highlight the joy, peace, and blessing that come from belonging to God. Our purpose as Christians is to glorify Him, and this purpose infuses even our pain and weakness with meaning. We are called to bear fruit, to grow, and to reflect God’s character in our daily lives. The presence of spiritual fruit—love, joy, peace, and more—is the evidence of our inner transformation. A life that shows no growth is not truly alive. As Paul says in Galatians, “If we live by the Spirit, let us also walk by the Spirit.”
To be alive in Christ means to live with purpose. Our aim is the glory of God in all that we do, whether in hardship or in joy. The life God gives us is not to be hoarded or lived for ourselves. It is to be used in love and service toward God and toward others. The Spirit gives each believer gifts not for personal gain but for the benefit of the body of Christ. Love is the first and defining fruit of the Spirit, and through it we fulfill our calling. As Christians, we are invited to abide daily in Christ, to drink deeply from His grace, and to walk in obedience. This is both our duty and our highest privilege: to live as those who are truly alive, empowered by the Spirit, and committed to the glory of God.