The presence of the Spirit of Christ in us is evidenced by our desires for spiritual things and our ability to please God, as detailed in Romans 8.
In Romans 8, Paul explicitly states that if anyone does not have the Spirit of Christ, he does not belong to Christ. The Spirit's presence is confirmed through the believer's mindset and inclinations. A genuine desire to seek spiritual growth, a focus on one’s relationship with Christ, and a transformation that leads to producing fruit in accordance with righteousness are all signs of the Spirit's indwelling. The Spirit also bears witness with our own spirit that we are children of God, providing assurance of our salvation and belonging to Him. This spiritual reality drives the believer to live a life that is pleasing to God, rooted in love and obedience.
Commentary