1 Corinthians 15:28
When he has done this, then the Son himself will be made subject to him who put everything under him, so that God may be all in all.
If Jesus is one of the Trinity, and therefore one God with the Father, why does the apostle Paul write that he too will be subject to God?
Paul’s words refer to the human nature of Jesus (John 1:14; Galatians 4:4) for which he is inferior to the Father and is subject to him, and not to his divine person for whom he is equal to the Father and is only one God with him (John 1:1; 10:30; 16:15; Colossians 2:9). In fact, shortly before those words, Paul writes: “But Christ has indeed been raised from the dead, the firstfruits of those who have fallen asleep.” (1 Corinthians 15:20) The resurrection took place through the human nature of Jesus, that is, through the flesh which became proper to the Son of God, who was first beaten and pierced on the cross, and not through his divine person. Jesus as the new Adam (1 Corinthians 15:45) and head of the Church (Colossians 1:18) will subject everything to the Father, and he himself is subject to the Father. As a divine person he is one with the Father and with his Holy Spirit, among whom there is no superiority of one over the other two.
Cristiani Cattolici Romani 