Lactantius — Divine Institutes (Chapter 5. Of the testimonies of poets and philosophers.)

But let us leave the testimony of prophets, lest a proof derived from those who are universally disbelieved should appear insufficient. Let us come to authors, and for the demonstration of the truth let us cite as witnesses those very persons whom they are accustomed to make use of against us — I mean poets and philosophers. From these we cannot fail in proving the unity of God; not that they had ascertained the truth, but that the force of the truth itself is so great, that no one can be so blind as not to see the divine brightness presenting itself to his eyes. The poets, therefore, however much they adorned the gods in their poems, and amplified their exploits with the highest praises, yet very frequently confess that all things are held together and governed by one spirit or mind. Orpheus, who is the most ancient of the poets, and coeval with the gods themselves — since it is reported that he sailed among the Argonauts together with the sons of Tyndarus and Hercules, — speaks of the true and great God as the first-born, because nothing was produced before Him, but all things sprung from Him. He also calls Him Phanes because when as yet there was nothing He first appeared and came forth from the infinite. And since he was unable to conceive in his mind the origin and nature of this Being, he said that He was born from the boundless air: The first-born, Phaethon, son of the extended air; for he had nothing more to say. He affirms that this Being is the Parent of all the gods, on whose account He framed the heaven, and provided for His children that they might have a habitation and place of abode in common: He built for immortals an imperishable home. Thus, under the guidance of nature and reason, he understood that there was a power of surpassing greatness which framed heaven and earth. For he could not say that Jupiter was the author of all things, since he was born from Saturn; nor could he say that Saturn himself was their author, since it was reported that he was produced from the heaven; but he did not venture to set up the heaven as the primeval god, because he saw that it was an element of the universe, and must itself have had an author. This consideration led him to that first-born god, to whom he assigns and gives the first place.

Homer was able to give us no information relating to the truth, for he wrote of human rather than divine things. Hesiod was able, for he comprised in the work of one book the generation of the gods; but yet he gave us no information, for he took his commencement not from God the Creator, but from chaos, which is a confused mass of rude and unarranged matter; whereas he ought first to have explained from what source, at what time, and in what manner, chaos itself had begun to exist or to have consistency. Without doubt, as all things were placed in order, arranged, and made by some artificer, so matter itself must of necessity have been formed by some being. Who, then, made it except God, to whose power all things are subject? But he shrinks from admitting this, while he dreads the unknown truth. For, as he wished it to appear, it was by the inspiration of the Muses that he poured forth that song on Helicon; but he had come after previous meditation and preparation.

Maro was the first of our poets to approach the truth, who thus speaks respecting the highest God, whom he calls Mind and Spirit: —

Know first, the heaven, the earth, the main, The moon's pale orb, the starry train, Are nourished by a Soul, A Spirit, whose celestial flame Glows in each member of the frame, And stirs the mighty whole.

And lest any one should happen to be ignorant what that Spirit was which had so much power, he has declared it in another place, saying: For the Deity pervades all lands, the tracts of sea and depth of heaven; the flocks, the herds, and men, and all the race of beasts, each at its birth, derive their slender lives from Him.

Ovid also, in the beginning of his remarkable work, without any disguising of the name, admits that the universe was arranged by God, whom he calls the Framer of the world, the Artificer of all things. But if either Orpheus or these poets of our country had always maintained what they perceived under the guidance of nature, they would have comprehended the truth, and gained the same learning which we follow.