And one of you is a devil (kai ex umwn ei diabolo estin). Jesus does not say that Judas was a devil when he chose him, but that he is one now. In Luke 13:2Luke 13:27 John speaks of the devil entering Judas. How soon the plan to betray Jesus first entered the heart of Judas we do not know ( Luke 12:4 ). One wonders if the words of Jesus here did not cut Judas to the quick.