Augustine of Hippo
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.
(xi. de Civ. Dei, c. xiv) Or when our Lord says, The truth is not in him, He intends it as an index: as if we had asked Him, how it appeared that the devil stood not in the truth; and He said, Because the truth is not in him. For it would be in him, if he stood in it.