52 For my part, so long as I shall have the power by means of this Spirit Whom You have granted me, Holy Father, Almighty God, I will confess You to be not only eternally God, but also eternally Father. Nor will I ever break out into such folly and impiety, as to make myself the judge of Your omnipotence and Your mysteries, nor shall this weak understanding arrogantly seek for more than that devout belief in Your infinitude and faith in Your eternity, which have been taught me.
I will not assert that You were ever without Your Wisdom, and Your Power, and Your Word, without God Only-begotten, my Lord Jesus Christ. The weak and imperfect language, to which our nature is limited, does not dominate my thoughts concerning You, so that my poverty of utterance should choke faith into silence. For although we have a word and wisdom and power of our own, the product of our free inward activity, yet Yours is the absolute generation of perfect God, Who is Your Word and Wisdom and Power; so that He can never be separated from You, Who in these names of Your eternal properties is shown to be born of You.
Yet His birth is only so far shown as to make manifest the fact that You are the Source of His being; yet sufficiently to confirm our belief in His infinity, inasmuch as it is related that He was born before times eternal.
Source: On the Trinity (New Advent)