And they began to inquire among themselves, which of them it was that should do this thing. That all the disciples, on hearing this statement of their Master, should at once question their own hearts with the "Is it I?"
(of St. Matthew's Gospel), shows with what cunning skill the arch-traitor must have concealed not merely his plans but his very sentiments. No suspicion on their parts ever seems to have fallen on Judas, their companion for so long a time.
The direct colloquy of the Lord with the traitor, reported at length in the other Gospels on the occasion of dipping the sop into one of the Paschal dishes, was most probably carried on in a whisper (see John 13:26-29, where mention is specially made of the disciples' ignorance of the dread meaning of their Master's words to Judas).