15 What then, brethren? Why have I said these things? Shut the ears of your hearts against the wiles of the enemy. Understand that God made all things, and arranged them in their orders. Why, then, do we suffer many evils from a creature that God made? Because we have offended God? Do angels suffer these things? Perhaps we, too, in that life of theirs, would have no such thing to fear. For your punishment, accuse your sin, not the Judge. For, on account of our pride, God appointed that tiny and contemptible creature to torment us; so that, since man has become proud and has boasted himself against God, and, though mortal, has oppressed mortals, and, though man, has not acknowledged his fellowman—since he has lifted himself up, he may be brought low by gnats. Why are you inflated with human pride? Some one has censured you, and you are swollen with rage. Drive off the gnats, that you may sleep: understand who you are. For, that you may know, brethren, it was for the taming of our pride these things were created to be troublesome to us, God could have humbled Pharaoh's proud people by bears, by lions, by serpents; He sent flies and frogs upon them, that their pride might be subdued by the meanest creatures.
16. “All things,” then, brethren, “all things were made by Him, and without Him was nothing made.” But how were all things made by Him? “That, which was made, in Him is life.” It can also be read thus: “That, which was made in Him, is life;” and if we so read it, everything is life. For what is there that was not made in Him? For He is the Wisdom of God, and it is said in the Psalm, “In Wisdom have You made all things.” If, then, Christ is the Wisdom of God, and the Psalm says, “In Wisdom have You made all things:” as all things were made by Him, so all things were made in Him. If, then, all things were made in Him, dearly beloved brethren, and that, which was made in Him, is life, both the earth is life and wood is life. We do indeed say wood is life, but in the sense of the wood of the cross, whence we have received life. A stone, then, is life. It is not seemly so to understand the passage, as the same most vile sect of the Manichæans creep stealthily on us again, and say that a stone has life, that a wall has a soul, and a cord has a soul, and wool, and clothing. For so they are accustomed to talk in their raving; and when they have been driven back and refuted, they in some sort bring forward Scripture, saying, “Why is it said, 'That, which was made in Him, is life'?” For if all things were made in Him, all things are life. Be not carried away by them; read thus “That which was made;” here make a short pause, and then go on, “in Him is life.” What is the meaning of this? The earth was made, but the very earth that was made is not life; but there exists spiritually in the Wisdom itself a certain reason by which the earth was made: this is life.
Source: Tractates on the Gospel of John (New Advent)