Judas, when he sold Christ, did not expect that He would be killed, but merely seized, and either render them some satisfaction, or in some way escape, as before, out of their hands. But on finding Him condemned to death, he felt the gravity of his sin. And repenting, when too late, of what he had done, he was self condemned, and hanged himself. "The devil is so crafty," says S. Chrysostom, 'that he allows not a man (unless very watchful) to see beforehand the greatness of his sin, lest he should repent and shrink from it. But as soon as a sin is fully completed, he allows him to see it, and thus overwhelms him with sorrow and drives him to despair. Judas was unmoved by Christ's many warnings; but when the deed had been wrought, he was brought to useless and unavailing repentance."
By C Lapide