Written before the gospel of
Mark is the letter to the
Romans. In that letter Jesus Christ is God.
But you are not in the flesh, but in the spirit, if indeed the Spirit of God dwells in you. But if anyone has not the Spirit of Christ, he is not of Him. But if Christ is in you, though the body is dead because of sin, yet the spirit is life because of righteousness. But if the Spirit of the Him who raised Jesus from the dead dwells in you, He who raised Christ Jesus from among the dead will also give life to your mortal bodies through His Spirit who in dwells you. (Rom. 8:9-11)
In a seamless way Paul uses interchangeably these titles
The Spirit of God,
The Spirit of Christ,
Christ,
The Spirit of Him who raise Jesus from the dead
The interchangeable use of each title with the other
makes Jesus Christ become God the apostles understanding and teaching.
The Spirit of God dwelling in them is equal to
the Spirit of Christ dwelling in them.
The Spirit of Christ dwelling in them is equal to
Christ dwelling in them.
Christ dwelling in them is equal to
the Spirit of Him Who raised Christ Jesus from the dead dwelling in them.
This early epistle therefore shows Paul taught that the indwelling Spirit of God was the God Who raised Jesus from the dead and was wonderfully Christ Himself.