Gregory the Great
Catena Aurea · Johannesevangelium 8
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it. And because I tell you the truth, ye believe me not. Which of you convinceth me of sin? And if I say the truth, why do ye not believe me? He that is of God heareth God’s words: ye therefore hear them not, because ye are not of God. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
(Hom. xviii. in Evang.) Observe here the condescension of God. He who by virtue of His Divinity could justify sinners, deigns to shew from reason, that He is not a sinner. It follows: He that is of God heareth God’s words; ye therefore hear them not, because ye are not of God.