Gregory the Great — as excerpted in the Catena Aurea on John 8:48-51

“(Hom. xviii. in Evang.) As the perversity of the wicked increases, preaching so far from giving way, ought even to become more active. Thus our Lord, after He had been accused of having a devil, imparts the treasures of preaching in a still larger degree: Verily, verily, I say unto you, If a man keep My saying, he shall never see death.”