Matthew Poole and continuators on Matthew 26:50

Mark saith nothing of what Christ said to him, Luke, Ch. 22.48. adds, that Christ said to him, Iudas, betrayest thou the Son of Man with a Kiss? Whether Christ used this Compellation of Friend to Iudas, to mind him what he formerly had been, and still ought to have been, or as a Common Compellation, (as we oft use it) is not much Material. A Kiss is the Symbol of Friendship, and Kindness, and therefore very impoperly used by a Traytor and professed Enemy (yet so used by Ioab to Amasa, 2 Sam. 20.9.) That makes our Saviour ask him, if he were not ashamed to betray the Son of Man by a Kiss. Iudas, by calling him Master, Master, acknowledged he had been once his disciple. By his Kiss, he pretended Friendship to him, yet betrayed him. O the depth of desperate Wickedness, which is in the Heart of Man! especially such as Apostatize from a former Profession, they are commonly the worst and falsest Enemies of Christ, and his Gospel.