Book Hilary gives a final explanation of the great Arian text, The Lord created me for a beginning of His ways; the words must not be taken literally. Christ is not created, but Creator (§§ 1-5). If He is a creature, the Father also is a creature, for They are One in nature and in honour (§§ 6, 7). The similar passage, I begot You from the womb, is figurative; elsewhere God's Hands and Eyes are spoken of. The sense is that the Son is God from God (§§ 8-10). Nor was Christ made; He is the Son, not the handiwork, of the Father (§§ 11, 12).
And His Sonship is immediate, not derivative like ours, or like that of Israel His firstborn. This latter kind of sonship has a definite beginning of existence, and an origin out of nothing (§§ 13-16). The Arian arguments fail to prove that the Sonship of Christ has either of these characters (§§ 17, 18). Truth is to be attained not by self-confident arguing but by faith (§ 19), yet it is not enough for us to avoid their reasonings; we must overthrow them (§ 20). The Son was born from eternity, being the Son of the eternal Father (§ 21).
The objection that sonship involves beginning does not hold in His case (§§ 22, 23). The Son has all that the Father has; He has therefore eternity and an unconditioned existence (§ 24). He is from the Eternal, and therefore eternal Himself; from the Eternal, and therefore not from nothing. Reason cannot grasp, and therefore cannot refute, this. We must not assert that there was a time before He was born, a time when He was not (§§ 25-27). We must not argue, from the analogy of our own birth, that the truth is impossible (§ 28), nor that, because of His eternal existence, the Son was not born (§§ 29-32).
Again, the Arians deny the eternal Fatherhood of God; He always existed, they say, but was not always the Father. This contradicts Scripture (§§ 33, 34). They argue that Wisdom is said to be the first of God's creatures; but creation, in this sense, is a synonym for generation, and Wisdom was antecedent to creation (§§ 35-38). Wisdom is coeternal with God (§ 39), and shared His eternal purpose of creation (§§ 40, 41). Nor may we believe that Christ was begotten simply in order to perform the creative work, as God's Minister, for Wisdom took part in the design as well as in the execution (§§ 42, 43).
And again, Wisdom is spoken of as created, as an indication of Her control over created things (§ 44). The creation to be a beginning of God's ways is a separate event from the eternal generation. It means that Christ, as the Way of Life, under the Old Covenant took the semblance, under the New Covenant the substance, of the creature man, to lead us into the way. The two senses must not be confused (§§ 45-49). Yet mere inaccuracy of speech, without heretical intent, is not unpardonable (§ 50).
After a final assertion (§ 51) of faith in Christ as God from God, the eternal Son, Hilary appeals to the Almighty Father, declaring his creed, his consciousness of human infirmity and of the need of faith (§§ 52, 53). The Son is the Only-begotten of God, the Second because He is the Son (§ 54). The Holy Ghost proceeds from the Father and is sent by the Son. He also is no creature, but of one nature with the God Whose mysteries He knows, and ineffable like Him Whose Spirit He is (§ 55). Finally, Hilary prays that, as he was baptized, so he may remain in the faith of Three Persons in One God.
Source: On the Trinity (New Advent)