5 But to these words, by which your heart is disturbed, bend your thought, and reflect with me on that which we were seeking out concerning the Word. We already hold that “the Word was God:” I join to this another thing, that, having said, “This was in the beginning with God,” the evangelist immediately subjoined, “All things were made by Him.” Now will I urge you by questioning, now will I move you against yourself, and sue you against yourself: only keep this in memory concerning the Word, that “the Word was God, and all things were made by Him.”
Hear now the words by which you were moved to assert that the Son is less, forsooth, because He said, “The Son cannot of Himself do anything, but what He sees the Father doing.” Just so, says he. Explain to me this a little: This is, I presume, how you think, that the Father does certain things, and the Son observes how the Father does, that He may also Himself be able to do those things which He sees the Father doing. You have set up two artisans, as it were: the Father and the Son just like master and learner, like as artisan fathers are wont to teach their sons their craft.
Behold, I come down to your carnal sense: for the moment I think as you do, let us see if this our conception finds an issue in harmony with the things which we have just now alike spoken and alike hold regarding the Word, that “the Word was God,” and that “all things were made by Him.” Suppose, then, the Father, as an artisan, doing certain works, and the Son as a learner, who “cannot of Himself do anything, but what He sees the Father doing:” He keenly watches, in a manner, the Father's hands, that, as He sees Him fashioning anything, so He may Himself in like manner fashion something similar by His own works.
But the Father here does all those things that He does, and wishes the Son to give heed to Him, and to do the like also Himself; by whom does the Father? Come! now is the time for you to stand to your former opinion, which you recited with me, and held with me; that “in the beginning was the Word, and the Word was with God, and the Word was God, and all things were made by Him.” But you, after holding with me, that all things were made by the Word, dost again, with your carnal wit and childish fancy, imagine with yourself God making something, and the Word giving heed; so that when God has made, the Word also may make the like.
Now, what does God make without the Word? For if He does anything, then were not all things made by the Word; you have given up the position which you held. But if all things were made by the Word, correct what you understood amiss. The Father made, and made only by the Word: in what way does the Word give heed to see the Father making without the Word, what the Word may do in like manner? Whatever the Father has made, He made it by the Word; else is it false that “all things were made by Him.” But it is true that “all things were made by Him.” Perhaps this did not seem enough for you? Well, “and without Him was nothing made.”
Source: Tractates on the Gospel of John (New Advent)