6 Accordingly, dearly beloved brethren, let us understand that the Word of God is incorporeally, inviolably, unchangeably, without temporal nativity, yet born of God. Do we think that we can any how persuade certain unbelievers that that is not it, consistent with the truth, which is said by us according to the Catholic faith,which is contrary to the Arians, by whom the Church of God has been often tried, forasmuch as carnal men receive with greater ease what they have been accustomed to see?
For some have dared to say, “The Father is greater than the Son, and precedes Him in you;” that is, the Father is greater than the Son, and the Son is less than the Father, and is preceded by the Father in you. And they argue thus; “If He was born, of course the Father was before His Son was born to Him.” Attend; may He be with me, while your prayers assist me, and with godly heed desire to receive what He may give, what He may suggest to me; may He be with me, that I may be able in some sort to explain what I have begun.
Yet, brethren, I tell you before I begin, if I shall not be able to explain it, do not suppose that it is the failure of the proof, but of the man. Accordingly I exhort and entreat you to pray; that the mercy of God may be with me, and make the matter be so explained by me, as is meet for you to hear, and for me to speak. They then say thus; “If He be the Son of God, He was born.” This we confess. For He would not be a Son, if He were not born. It is plain, the faith admits it, the Catholic Church approves it, it is truth.
They then go on; “If the Son was born to the Father, the Father was before the Son was born to Him.” This the faith rejects, Catholic ears reject it, it is anathematized, whoso entertains this conceit is without, he belongs not to the fellowship and society of the saints. Then says he, “Give me an explanation, how the Son could be born to the Father, and yet be coeval with Him of whom He was born?”
Source: Sermons on Selected Lessons of the New Testament (New Advent)