13 Give good heed to what follows, brethren, “All things were made by Him, and without Him was nothing made,” so as not to imagine that “nothing” is something. For many, wrongly understanding “without Him was nothing made,” are wont to fancy that “nothing” is something. Sin, indeed, was not made by Him; and it is plain that sin is nothing, and men become nothing when they sin. An idol also was not made by the Word;— it has indeed a sort of human form, but man himself was made by the Word;— for the form of man in an idol was not made by the Word, and it is written, “We know that an idol is nothing.” Therefore these things were not made by the Word; but whatever was made in the natural manner, whatever belongs to the creature, everything that is fixed in the sky, that shines from above, that flies under the heavens, and that moves in universal nature, every creature whatsoever: I will speak more plainly, brethren, that you may understand me; I will say, from an angel even to a worm.
What more excellent than an angel among created things? What lower than a worm? He who made the angel made the worm also; but the angel is fit for heaven, the worm for earth. He who created also arranged. If He had placed the worm in heaven, you might have found fault; if He had willed that angels should spring from decaying flesh, you might have found fault: and yet God almost does this, and He is not to be found fault with. For all men born of flesh, what are they but worms?
And of these worms God makes angels. For if the Lord Himself says, “But I am a worm and no man,” who will hesitate to say what is written also in Job, “How much more is man rottenness, and the son of man a worm?” First he said, “Man is rottenness;” and afterwards, “The son of man a worm:” because a worm springs from rottenness, therefore “man is rottenness,” and “the son of man a worm.” Behold what for your sake He was willing to become, who “in the beginning was the Word, and the Word was with God, and the Word was God!”
Why did He for your sake become this? That you might suck, who were not able to chew. Wholly in this sense, then, brethren, understand “All things were made by Him, and without Him was nothing made.” For every creature, great and small, was made by Him: by Him were made things above and things beneath; spiritual and corporeal, by Him were they made. For no form, no structure, no agreement of parts, no substance whatever that can have weight, number, measure, exists but by that Word, and by that Creator Word, to whom it is said, “You have ordered all things in measure, and in number, and in weight.”
Source: Tractates on the Gospel of John (New Advent)