Romans 8:11

But though the present results of the indwelling of the spirit are not all we might desire, the future is sure. The indwelling spirit is that of Him who raised Jesus from the dead, and as such it is the guarantee that our mortal bodies also (as well as our spirits) shall share in immortality. The same argument, in effect, is used in Ephesians 1:18-20. “The power that worketh in us” is the same with which “God wrought in Christ when He raised Him from the dead and set Him at His own right hand in the heavenly places”; and it will work to the same issue in us as in Him. The reading in the last clause is very doubtful, but whether we take the accus. (according to which the indwelling of the spirit is the ground on which God raises our mortal bodies to undying life) or the genit. (according to which the spirit is itself the agent in this resurrection a conception not found elsewhere in Scripture), in either case a share in the Christian resurrection is conditioned by the possession of the Spirit of Christ. It is clear from the alternation of πνεῦμα θεοῦ and πνεῦμα χριστοῦ in Romans 8:9 that the Spirit of Christ is the same as the Spirit of God, and the use of χριστὸς alone in the next verse shows that this same spirit is the alter ego of Christ. Cf. Philippians 1:19; Galatians 4:6; Ephesians 3:17. This is one of the passages in which the presuppositions of the Trinitarian conception of God come out most clearly.