Augustine wrote:
"We believe, we maintain, we faithfully preach, that the Father begat the Word, that is, Wisdom, by which all things were made, the only-begotten Son, one as the Father is one, eternal as the Father is eternal, and, equally with the Father, supremely good; and tha the Holy Spirit is the Spirit alike of Father and of Son, and is Himself consubstantial and co-eternal with both; and that this whole is a Trinity by reason of the individuality of the persons, and one God by reason of the indivisible divine substance, as also one Almighty by reason of the indivisible omnipotence; yet so that, when we inquire regarding each singly, it is said that each is God and Almighty; an, when we speak of all together, it is said that there are not three Gods, nor three Almighties, but one God Almighty; so great is the indivislbe unity of these Three, which requires that it be so stated" (from the City of God, 11.24).
"We believe, we maintain, we faithfully preach, that the Father begat the Word, that is, Wisdom, by which all things were made, the only-begotten Son, one as the Father is one, eternal as the Father is eternal, and, equally with the Father, supremely good; and tha the Holy Spirit is the Spirit alike of Father and of Son, and is Himself consubstantial and co-eternal with both; and that this whole is a Trinity by reason of the individuality of the persons, and one God by reason of the indivisible divine substance, as also one Almighty by reason of the indivisible omnipotence; yet so that, when we inquire regarding each singly, it is said that each is God and Almighty; an, when we speak of all together, it is said that there are not three Gods, nor three Almighties, but one God Almighty; so great is the indivislbe unity of these Three, which requires that it be so stated" (from the City of God, 11.24).