1 On the other hand, the sacred doctrine teaches that he who is the supreme Source of good, and Cause of all things, is beyond all comprehension, and therefore inexpressible by word, or speech, or name; surpassing the power, not of language only, but of thought itself. Uncircumscribed by place, or body; neither in heaven, nor in ethereal space, nor in any other part of the universe; but entirely independent of all things else, he pervades the depths of unexplored and secret wisdom. The sacred oracles teach us to acknowledge him as the only true God, apart from all corporeal essence, distinct from all subordinate ministration. Hence it is said that all things are from him, but not through him.
2. And he himself dwelling as Sovereign in secret and undiscovered regions of unapproachable light, ordains and disposes all things by the single power of his own will. At his will whatever is, exists; without that will, it cannot be. And his will is in every case for good, since he is essentially Goodness itself. But he through whom are all things, even God the Word, proceeding in an ineffable manner from the Father above, as from an everlasting and exhaustless fountain, flows onward like a river with a full and abundant stream of power for the preservation of the universal whole.
3. And now let us select an illustration from our own experience. The invisible and undiscovered mind within us, the essential nature of which no one has ever known, sits as a monarch in the seclusion of his secret chambers, and alone resolves on our course of action. From this proceeds the only-begotten word from its father's bosom, begotten in a manner and by a power inexplicable to us; and is the first messenger of its father's thoughts, declares his secret counsels, and, conveying itself to the ears of others, accomplishes his designs.
4. And thus the advantage of this faculty is enjoyed by all: yet no one has ever yet beheld that invisible and hidden mind, which is the parent of the word itself. In the same manner, or rather in a manner which far surpasses all likeness or comparison, the perfect Word of the Supreme God, as the only-begotten Son of the Father (not consisting in the power of utterance, nor comprehended in syllables and parts of speech, nor conveyed by a voice which vibrates on the air; but being himself the living and effectual Word of the most High, and subsisting personally as the Power and Wisdom of God), proceeds from his Father's Deity and kingdom. Thus, being the perfect Offspring of a perfect Father, and the common Preserver of all things, he diffuses himself with living power throughout creation, and pours from his own fullness abundant supplies of reason, wisdom, light, and every other blessing, not only on objects nearest to himself, but on those most remote, whether in earth, or sea, or any other sphere of being.
5. To all these he appoints with perfect equity their limits, places, laws, and inheritance, allotting to each their suited portion according to his sovereign will. To some he assigns the super-terrestrial regions, to others heaven itself as their habitation: others he places in ethereal space, others in air, and others still on earth. He it is who transfers mankind from hence to another sphere, impartially reviews their conduct here, and bestows a recompense according to the life and habits of each. By him provision is made for the life and food, not of rational creatures only, but also of the brute creation, for the service of men;
6. and while to the latter he grants the enjoyment of a perishable and fleeting term of existence, the former he invites to a share in the possession of immortal life. Thus universal is the agency of the Word of God: everywhere present, and pervading all things by the power of his intelligence, he looks upward to his Father, and governs this lower creation, inferior to and consequent upon himself, in accordance with his will, as the common Preserver of all things.
7. Intermediate, as it were, and attracting the created to the uncreated Essence, this Word of God exists as an unbroken bond between the two, uniting things most widely different by an inseparable tie. He is the Providence which rules the universe; the guardian and director of the whole: he is the Power and Wisdom of God the only-begotten God, the Word begotten of God himself. For “In the beginning was the Word, and the Word was with God, and the Word was God. All things were made by him and without him was not anything made that has been made”; as we learn from the words of the sacred writer. Through his vivifying power all nature grows and flourishes, refreshed by his continual showers, and invested with a vigor and beauty ever new.
8. Guiding the reigns of the universe, he holds its onward course in conformity to the Father's will and moves, as it were, the helm of this mighty ship. This glorious Agent, the only-begotten Son of the Supreme God, begotten by the Father as his perfect Offspring, the Father has given to this world as the highest of all goods; infusing his word, as spirit into a lifeless body, into unconscious nature; imparting light and energy to that which in itself was a rude, inanimate, and formless mass, through the Divine power. Him therefore it is ours to acknowledge and regard as everywhere present, and giving life to matter and the elements of nature: in him we see Light, even the spiritual offspring of inexpressible Light: one indeed in essence, as being the Son of one Father; but possessing in himself many and varied powers.
9. The world is indeed divided into many parts; yet let us not therefore suppose that there are many independent Agents: nor, though creation's works be manifold, let us thence assume the existence of many gods. How grievous the error of those childish and infatuated advocates of polytheistic worship, who deify the constituent parts of the universe, and divide into many that system which is only one!
10. Such conduct resembles theirs who should abstract the eyes of an individual man, and term them the man himself, and the ears, another man, and so the head: or again, by an effort of thought should separate the neck, the breast and shoulders, the feet and hands, or other members, nay, the very powers of sense, and thus pronounce an individual to be a multitude of men. Such folly must surely be rewarded with contempt by men of sense. Yet such is he who from the component parts of a single world can devise for himself a multitude of gods, or even deem that world which is the work of a Creator, and consists of many parts, to be itself a god: not knowing that the Divine Nature can in no sense be divisible into parts; since, if compounded, it must be so through the agency of another power; and that which is so compounded can never be Divine. How indeed could it be so, if composed of unequal and dissimilar, and hence of worse and better elements? Simple, indivisible, uncompounded, the Divine Nature exists at an infinite elevation above the visible constitution of this world.
Source: Oration in Praise of Constantine (New Advent)