Catena Aurea on John 5:31–40: Hilary of Poitiers

The Only-begotten God shews Himself to be the Son, on the testimony not of man only, but of His own power. The works which He does, bear witness to His being sent from the Father. Therefore the obedience of the Son and the authority of the Father are set forth in Him who was sent. But the testimony of works not being sufficient evidence, it follows, And the Father Himself which hath sent Me, hath borne witness of Me. Open the Evangelic volumes, and examine their whole range: no testimony of the Father to the Son is given in any of the books, other than that He is the Son. So what a calumny is it in men now saying that this is only a name of adoption: thus making God a liar, and names unmeaning.