And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.
All Commentaries on 1 Corinthians 15:28 Go To 1 Corinthians 15
Augustine of Hippo
AD 430
If the Son is equal, how is the Father greater? For the Lord himself says: “because the Father is greater than I.” However, the rule of Catholic faith is this: when the Scriptures say of the Son that he is less than the Father, the Scriptures mean in respect to the assumption of humanity. But when the Scriptures point out that he is equal, they are understood in respect to his deity.