John 1:3
And what is that? It is to make the sentence end at “was made,” and to begin the next sentence with, “In Him was Life.” What (the Evangelist) says is this, “Without Him was not anything made that was made”; whatever created thing was made, says he, was not made without Him. See you how by this short addition he has rectified all the besetting difficulties; for the saying, that “without Him was not anything made,” and then the adding, “which was made,” includes things cognizable by the intellect, but excludes the Spirit. For after he had said that “all things were made by Him,” and “without Him was not anything made,” he needed this addition, lest some one should say, “If all things were made by Him, then the Spirit also was made.” “I,” he replies, “asserted that whatever was made was made by Him, even though it be invisible, or incorporeal, or in the heavens. For this reason, I did not say absolutely, 'all things,' but 'whatever was made,' that is, 'created things,' but the Spirit is uncreated.”
Do you see the precision of his teaching? He has alluded to the creation of material things, (for concerning these Moses had taught before him,) and after bringing us to advance from thence to higher things, I mean the immaterial and the invisible, he excepts the Holy Spirit from all creation. And so Paul, inspired by the same grace, said, “For by Him were all things created.” Observe too here again the same exactness. For the same Spirit moved this soul also. That no one should except any created things from the works of God because of their being invisible, nor yet should confound the Comforter with them, after running through the objects of sense which are known to all, he enumerates also things in the heavens, saying, “Whether they be thrones, or dominions, or principalities, or powers”; for the expression “whether” subjoined to each, shows to us nothing else but this, that “by Him all things were made, and without Him was not anything made that was made.”
But if you think that the expression “by” is a mark of inferiority, (as making Christ an instrument,) hear him say, “You, Lord, in the beginning, hast laid the foundation of the earth, and the heavens are the work of Your hands.” He says of the Son what is said of the Father in His character of Creator; which he would not have said, unless he had deemed of Him as of a Creator, and yet not subservient to any. And if the expression “by Him” is here used, it is put for no other reason but to prevent any one from supposing the Son to be Unbegotten. For that in respect of the title of Creator He is nothing inferior to the Father; hear from Himself, where He says, “As the Father raises up the dead and quickens them, even so the Son quickens whom He will.” If now in the Old Testament it is said of the Son, “You, Lord, in the beginning hast laid the foundation of the earth,” His title of Creator is plain. But if you say that the Prophet spoke this of the Father, and that Paul attributed to the Son what was said of the Father, even so the conclusion is the same. For Paul would not have decided that the same expression suited the Son, unless he had been very confident that between Father and Son there was an equality of honor; since it would have been an act of extremest rashness to refer what suited an incomparable Nature to a nature inferior to, and falling short of it. But the Son is not inferior to, nor falls short of, the Essence of the Father; and therefore Paul has not only dared to use these expressions concerning Him, but also others like them. For the expression “from Whom,” which you decide to belong properly to the Father alone, he uses also concerning the Son, when he says, “from which all the body by joints and bands having nourishment ministered, and knit together, increases with the increase of God.”
3. And he is not content with this only, he stops your mouths in another way also, by applying to the Father the expression “by whom,” which you say is a mark of inferiority. For he says, “God is faithful, by whom you were called unto the fellowship of His Son”: and again, “By His will”; and in another place, “For of Him, and through Him, and to Him, are all things.” Neither is the expression “from whom,” assigned to the Son only, but also to the Spirit; for the angel said to Joseph, “Fear not to take unto you Mary your wife, for that which is conceived in her is of the Holy Ghost.” As also the Prophet does not deem it improper to apply to the Father the expression “in whom,” which belongs to the Spirit, when he says, “In God we shall do valiantly.” And Paul, “Making request, if by any means now at length I might have a prosperous journey, in the will of God, to come unto you.” And again he uses it of Christ, saying, “In Christ Jesus.” In short, we may often and continually find these expressions interchanged; now this would not have taken place, had not the same Essence been in every instance their subject. And that you may not imagine that the words, “All things were made by Him,” are in this case used concerning His miracles, (for the other Evangelists have discoursed concerning these;) he farther goes on to say, “He was in the world, and the world was made by Him”; (but not the Spirit, for This is not of the number of created things, but of those above all creation.)
Let us now attend to what follows. John having spoken of the work of creation, that “All things were made by Him, and without Him was not anything made that was made,” goes on to speak concerning His Providence, where he says, “In Him was Life.” That no one may doubt how so many and so great things were “made by Him,” he adds, that “In Him was Life.” For as with the fountain which is the mother of the great deeps, however much you take away you nothing lessen the fountain; so with the energy of the Only-Begotten, however much you believe has been produced and made by it, it has become no whit the less. Or, to use a more familiar example, I will instance that of light, which the Apostle himself added immediately, saying, “And the Life was the Light.” As then light, however many myriads it may enlighten, suffers no diminution of its own brightness; so also God, before commencing His work and after completing it, remains alike indefectible, nothing diminished, nor wearied by the greatness of the creation. Nay, if need were that ten thousand, or even an infinite number of such worlds be created, He remains the same, sufficient for them all not merely to produce, but also to control them after their creation. For the word “Life” here refers not merely to the act of creation, but also to the providence (engaged) about the permanence of the things created; it also lays down beforehand the doctrine of the resurrection, and is the beginning of these marvelous good tidings. Since when “life” has come to be with us, the power of death is dissolved; and when “light” has shone upon us, there is no longer darkness, but life ever abides within us, and death cannot overcome it. So that what is asserted of the Father might be asserted absolutely of Him (Christ) also, that “In Him we live and move and have our being.” As Paul has shown when he says, “By Him were all things created,” and “by Him all things consist”; for which reason He has been called also “Root” and “Foundation.”
Source: Homilies on the Gospel of John (New Advent)