Spirit of God is Spirit of Christ; Word truly became human

So then: the one raised from the dead is God, because the Word became flesh.

“Those who are in the flesh cannot please God. But you are not in the flesh but in the Spirit, if the Spirit of God dwells in you. If anyone does not have the Spirit of Christ, he does not belong to him. But if Christ is in you, the body is dead because of sin, yet the Spirit is life because of righteousness. If the Spirit of him who raised Jesus from the dead dwells in you, he who raised Christ Jesus from the dead will also make your mortal bodies alive through his Spirit who dwells in you.”

See how clearly God’s Spirit is called Christ’s. But if Christ were only a human set apart on his own, merely having God’s Word dwelling in him, how would the divine Spirit be called his? Yet the Spirit is his own — therefore he is God, and not otherwise. For God’s Word did not come to be in a human in that way; rather, he truly became human while remaining God. Only so can the Father’s Spirit be understood as Christ’s Spirit.

“For all who are led by the Spirit of God are sons of God. You did not receive a spirit of slavery again to fear, but you received a spirit of adoption, in which we cry, ‘Abba, Father.’” The blessed Paul writes: “Because you are sons, God sent the Spirit of his Son into your hearts, crying, ‘Abba, Father.’”

So if by the Son’s Spirit we have boldness to call God Father — enriched with the Spirit of the Son who is Son by nature and in truth — how is Christ not God? Not merely as he is thought a human like us, but as the Word became flesh and shared blood and flesh as we do.

“Who will separate us from the love of God? Affliction, or distress, or persecution, or famine, or danger, or sword?”