(22) Then the disciples looked one on another.--Comp. Matthew 26:22 et seq., and the parallel in Mark 14:19 and Luke 22:23. St. Matthew and St. Mark both state that they expressed their doubt in words, and St. Luke's narrative implies this questioning, but as addressed to one another, not to our Lord ("And they began to inquire among themselves"). St. John remembers the look of astonishment, and the way in which each tried to read the countenance of his brother as they all heard the words, which asserted that there was a traitor in their midst. He was nearest to our Lord, and knew what others may not have known, how Peter beckoned to him, and how he put the question to our Lord. This is the moment which has been caught in Leonardo da Vinci's famous masterpiece in the refectory of the Dominican Fathers at Milan. The painting itself has almost passed away, but perhaps no work of art is so widely known. The three Apostles mentioned in the text are all on the right of our Lord. John is nearest to Him, and leaning towards Peter, who stretches behind Judas to speak to "the disciple whom Jesus loved." Judas, clutching the bag and upsetting the salt, declaring in every feature of that wondrous face, which cost Da Vinci a whole year's study in the lowest quarter of the city, that he is the traitor, is on the right hand of John, and between him and Peter. This verse can have no better comment than a study of this great picture, accompanied by the chapter in Lanzi's Storia Pittorica or Mrs. Jameson's Sacred and Legendary Art, would provide, and Englishmen have a noble copy of it in their own National Gallery. (See the Sacred and Legendary Art, Ed. 3, 1857, vol. i., p. 209.)

13:18-30 Our Lord had often spoken of his own sufferings and death, without such trouble of spirit as he now discovered when he spake of Judas. The sins of Christians are the grief of Christ. We are not to confine our attention to Judas. The prophecy of his treachery may apply to all who partake of God's mercies, and meet them with ingratitude. See the infidel, who only looks at the Scriptures with a desire to do away their authority and destroy their influence; the hypocrite, who professes to believe the Scriptures, but will not govern himself by them; and the apostate, who turns aside from Christ for a thing of naught. Thus mankind, supported by God's providence, after eating bread with Him, lift up the heel against Him! Judas went out as one weary of Jesus and his apostles. Those whose deeds are evil, love darkness rather than light.Then the disciples looked one to another,.... As persons surprised and astonished, and as scarce crediting what was said; not having had the least suspicion of anyone among them, that could be guilty of such an action; and expressing by their looks their detestation of, and indignation at so horrible an iniquity; or they looked one to another, to observe if they could, whether the countenance of anyone would discover who the person was:

doubting of whom he spake; not being able to conceive and imagine, who the person was he had in view; from whence it appears, that Judas, to this time, had behaved outwardly as well as any of the other disciples; he had given no occasion, by his conduct, to suspect him more than any other: upon this broad intimation, or rather strong protestation which Christ made, that one of them should betray him, their eyes were not turned to him directly and particularly, but to one another.