“Do not separate the Son from the perfections of God, for those perfections of the Father are not to be mentioned in such a way as to be withdrawn from Him who said: ‘I and the Father are one,’ and of whom the Apostle says: ‘Who, though he was by nature God, did not consider it robbery to be equal to God.’
Now, robbery is the usurpation of another’s property even though there be an equality in nature. In view of this, how will the Son not be omnipotent, since through Him all things were made and since He is also the Power and Wisdom of God?
Moreover, in that form in which He is equal to the Father He is by nature invisible. In fact, the Word of God is invisible by nature because He was in the beginning and He was God.
In this same nature He is also completely immortal, that is, He remains immutable in every respect. For the human soul is also said to be immortal to a certain extent, but that is not genuine immortality in which there is such great change, making it possible to fail and to advance.
Thus, it is death for the human soul to be severed from the life of God through the ignorance which is in the soul; but it is life for it to run to the fountain of life, so that in the light of God it may see light. Immediately after this life you, too, through the grace of Christ, will be restored from certain death which you renounce.
But the Word of God, the only-begotten Son, always lives unchangeably with His Father. He neither decreases, because His abiding presence is not lessened; nor does He advance, because His perfection is not increased.
He Himself is the Creator of the visible and invisible worlds, because, as the Apostle says: ‘In him were created all things in the heavens and on the earth, things visible and things invisible, whether Thrones, or Dominations, or Principalities, or Powers. All things have been created through and unto him, … and in him all things hold together.’
However, since He ‘emptied himself,’ not losing the nature of God, but ‘taking the nature of a slave,’ He, the invisible, became visible in this form of a servant, because He was born of the Holy Spirit and of the Virgin Mary.
In this form of a servant, the Omnipotent One became weak, in that He suffered under Pontius Pilate.
In this form of a servant, the Immortal One died, in that He was crucified and was buried.
In this form of a servant, the King of ages rose on the third day.
In this form of a servant, the Creator of things visible and invisible ascended into heaven, whence He had never departed.
In this form of a servant, He who is the arm of the Father, and of whom the Prophet says: ‘And to whom is the arm of the Lord revealed?’ sits at the right of the Father.
In this form of a servant, He will come to judge the living and the dead, for in this form He wished to be a Companion of the dead inasmuch as He is the Life of the living.
Through Him the Holy Spirit was sent by the Father and by Himself, the Spirit of the Father and of the Son, sent by both, begotten by neither; the unity of both, equal to both.
This Trinity is one God, omnipotent, invisible, King of ages, Creator of things visible and invisible.
For we do not speak of three Lords, or of three Omnipotent Ones, or of three Creators or of three of whatever other perfections of God can be mentioned, because there are not three Gods but only one God.
Although in this Trinity, the Father is not the Son, nor is the Son the Father, nor is the Holy Spirit the Son or the Father, yet the Father belongs to the Son; the Son, to the Father; and the Holy Spirit, to both the Father and the Son.
Believe so that you may understand. For, unless you believe, you will not understand.
As a result of this faith, hope for grace by which all your sins will be forgiven. Only in this way and not by your own efforts will you be saved, for salvation is a gift of God.”
–Augustine of Hippo, “On the Presentation of the Creed,” Sermons on the Liturgical Seasons (ed. Hermigild Dressler; trans. Mary Sarah Muldowney; vol. 38; The Fathers of the Church; Washington, DC: The Catholic University of America Press, 1959), 38: 117–120.