Catena Aurea on John 1:3: Hilary of Poitiers

Or thus; That all things were made by him, is pronouncing too much, it may be said. There is an Unbegotten Who is made of none, and there is the Son Himself begotten from Him Who is Unbegotten. The Evangelist however again implies the Author, when he speaks of Him as Associated; saying, without Him was not any thing made. This, that nothing was made without Him, I understand to mean the Son’s not being alone, for ‘by whom’ is one thing, ‘not without whom’ another.