1 Corinthians 11:3
But I want you to realize that the head of every man is Christ, and the head of the woman is man, and the head of Christ is God.
If Jesus is one of the Trinity, and therefore one God with the Father and the Holy Spirit, why does the Apostle Paul say that God is the head of Christ?
The Son of God hypostatically united to himself a flesh animated by a rational soul, becoming man (John 1:14; Galatians 4:4) remaining God (John 20:28; Acts 20:28; Colossians 2:9; Titus 2:13; 2 Peter 1:1). Therefore Jesus Christ is true God and true man in the unity of the divine Second Person of the Trinity. In him the two natures, divine and human, exist without confusion or change or division or separation. Therefore Christ is not a demigod, nor a man inhabited by the divine Logos, nor is the divine Logos converted into flesh. Both natures, in Christ, I keep their integrity. Two natures: divine and human. The subject is one: the divine Second Person of the Trinity (Matthew 28:19), the Son (John 3:17; 5:18), the only begotten of the Father (John 1:14.18; 3:16.18), the eternal Logos for through which all visible and invisible things were made (John 1:1-3; Colossians 1:16-17; Hebrews 1:2; 1 Corinthians 8:6). Now, the words of Paul: “The head of Christ is God” (1 Corinthians 11:3), must be referred to the human nature of Jesus, for which he is inferior to the Father and is subject to him, and not to his divine person, for which he is equal to the Father (John 16:15) and is with him only one God (John 10:30; Romans 8:9; Galatians 4:6; 1 Peter 1:11). One God, because he participates fully in the same and indivisible divine substance of the Father, and for this he can say: “All that belongs to the Father is mine.”