Summary (of Doctrine) Regarding the Father, the Son, and the Holy Spirit, and the Other Topics Discussed in the Preceding Pages.
28 It is now time, after the rapid consideration which to the best of our ability we have given to the topics discussed, to recapitulate, by way of summing up what we have said in different places, the individual points, and first of all to restate our conclusions regarding the Father, and the Son, and the Holy Spirit.
Seeing God the Father is invisible and inseparable from the Son, the Son is not generated from Him by “prolation,” as some suppose. For if the Son be a “prolation” of the Father (the term “prolation” being used to signify such a generation as that of animals or men usually is), then, of necessity, both He who “prolated” and He who was “prolated” are corporeal. For we do not say, as the heretics suppose, that some part of the substance of God was converted into the Son, or that the Son was procreated by the Father out of things non-existent, i.e., beyond His own substance, so that there once was a time when He did not exist; but, putting away all corporeal conceptions, we say that the Word and Wisdom was begotten out of the invisible and incorporeal without any corporeal feeling, as if it were an act of the will proceeding from the understanding. Nor, seeing He is called the Son of (His) love, will it appear absurd if in this way He be called the Son of (His) will. Nay, John also indicates that “God is Light,” and Paul also declares that the Son is the splendour of everlasting light. As light, accordingly, could never exist without splendour, so neither can the Son be understood to exist without the Father; for He is called the “express image of His person,” and the Word and Wisdom. How, then, can it be asserted that there once was a time when He was not the Son? For that is nothing else than to say that there was once a time when He was not the Truth, nor the Wisdom, nor the Life, although in all these He is judged to be the perfect essence of God the Father; for these things cannot be severed from Him, or even be separated from His essence. And although these qualities are said to be many in understanding, yet in their nature and essence they are one, and in them is the fullness of divinity. Now this expression which we employ— “that there never was a time when He did not exist”— is to be understood with an allowance. For these very words “when” or “never” have a meaning that relates to time, whereas the statements made regarding Father, Son, and Holy Spirit are to be understood as transcending all time, all ages, and all eternity. For it is the Trinity alone which exceeds the comprehension not only of temporal but even of eternal intelligence; while other things which are not included in it are to be measured by times and ages. This Son of God, then, in respect of the Word being God, which was in the beginning with God, no one will logically suppose to be contained in any place; nor yet in respect of His being “Wisdom,” or “Truth,” or the “Life,” or “Righteousness,” or “Sanctification,” or “Redemption:” for all these properties do not require space to be able to act or to operate, but each one of them is to be understood as meaning those individuals who participate in His virtue and working.
29. Now, if any one were to say that, through those who are partakers of the “Word” of God, or of His “Wisdom,” or His “Truth,” or His “Life,” the Word and Wisdom itself appeared to be contained in a place, we should have to say to him in answer, that there is no doubt that Christ, in respect of being the “Word” or “Wisdom,” or all other things, was in Paul, and that he therefore said, “Do you seek a proof of Christ speaking in me?” and again, “I live, yet not I, but Christ lives in me.” Seeing, then, He was in Paul, who will doubt that He was in a similar manner in Peter and in John, and in each one of the saints; and not only in those who are upon the earth, but in those also who are in heaven? For it is absurd to say that Christ was in Peter and in Paul, but not in Michael the archangel, nor in Gabriel. And from this it is distinctly shown that the divinity of the Son of God was not shut up in some place; otherwise it would have been in it only, and not in another. But since, in conformity with the majesty of its incorporeal nature, it is confined to no place; so, again, it cannot be understood to be wanting in any. But this is understood to be the sole difference, that although He is in different individuals as we have said— as Peter, or Paul, or Michael, or Gabriel— He is not in a similar way in all beings whatever. For He is more fully and clearly, and, so to speak, more openly in archangels than in other holy men. And this is evident from the statement, that when all who are saints have arrived at the summit of perfection, they are said to be made like, or equal to, the angels, agreeably to the declaration in the Gospels. Whence it is clear that Christ is in each individual in as great a degree as the amount of his deserts allows.
30. Having, then, briefly restated these points regarding the nature of the Trinity, it follows that we notice shortly this statement also, that “by the Son” are said to be created “all things that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by Him, and for Him; and He is before all, and all things consist by Him, who is the Head.” In conformity with which John also in his Gospel says: “All things were created by Him; and without Him was not anything made.” And David, intimating that the mystery of the entire Trinity was (concerned) in the creation of all things, says: “By the Word of the Lord were the heavens made; and all the host of them by the Spirit of His mouth.”
After these points we shall appropriately remind (the reader) of the bodily advent and incarnation of the only-begotten Son of God, with respect to whom we are not to suppose that all the majesty of His divinity is confined within the limits of His slender body, so that all the “word” of God, and His “wisdom,” and “essential truth,” and “life,” was either rent asunder from the Father, or restrained and confined within the narrowness of His bodily person, and is not to be considered to have operated anywhere besides; but the cautious acknowledgment of a religious man ought to be between the two, so that it ought neither to be believed that anything of divinity was wanting in Christ, nor that any separation at all was made from the essence of the Father, which is everywhere. For some such meaning seems to be indicated by John the Baptist, when he said to the multitude in the bodily absence of Jesus, “There stands one among you whom you know not: He it is who comes after me, the latchet of whose shoes I am not worthy to unloose.” For it certainly could not be said of Him, who was absent, so far as His bodily presence is concerned, that He was standing in the midst of those among whom the Son of God was not bodily present.
Source: De Principiis (New Advent)