Some mind-blowing stuff from Augustine’s work on the Trinity:
[M]any things are said in the holy books to suggest, or even state openly that the Father is greater than the Son. This has misled people who are careless about examining or keeping in view the whole range of scriptures, and they have tried to transfer what is sent of Christ Jesus as man to that substance of his which was everlasting before the incarnation and is everlasting still. They say the Son is less than the Father because it is written in the Lord’s own words, “The father is greater than I” (John 14:28); the truth, however, shows it as far as that goes the Son is less than even himself. How could it be otherwise with him who “emptied himself, taking the form of a servant” (Phil 2:7)? For he he did not so take the form of a servant that he lost the form of God in which he was equal to the Father. So if the form of a servant was taken on in such a way that the form of God was not lost—since it is the same only begotten Son of the Father who is both in the form of a servant and in the form of God, equal to the Father in the form of God, in the form of a servant the mediator of God and the man the man Jesus Christ—who can fail to see that in the form of God he too is greater than himself and in the form of a servant he is less than himself? And so it is not without reason that the Scripture says both; but the Son is equal to the Father and the Father is greater than the Son. The one who is to be understood in virtue of the form of God, the other in virtue the form of a servant, without any confusion. (1.7.14)
Augustine, The Trinity, ed. John E. Rotelle, trans. Edmund Hill, 2nd ed. (Hyde Park, NY: New City Press, 2015), 76–77. Emphasis mine.