Rom 8:10

8:10 the Spirit is life. This phrase could refer to the renewed spirit of the believer, but it probably means the Holy Spirit. The passage itself emphasizes the Holy Spirit, His work, and His close association with Christ. The indwelling “Spirit of God” is called the “Spirit of Christ” (v. 9), and His indwelling is the means whereby “Christ is in you” (v. 10). Paul views this relationship as so close that he can even say “the Lord is the Spirit” (2 Cor. 3:17; cf. 1 Cor. 15:45). These passages do not take away the distinction between Christ and the Spirit as separate Persons of the Trinity. Rather, Paul teaches that Christ and the Holy Spirit work together in applying the resurrected life of Christ to the believer. The Spirit’s presence now is a guarantee of the future bodily resurrection of the believer (v. 11).