John Calvin Commentary Matthew 26:25

"And Judas, who betrayed him, answered and said, Is it I, Rabbi? He saith unto him, Thou hast said." — Matthew 26:25 (ASV)

And Judas who betrayed him. Though we often see persons trembling who are conscious of wrongdoing, yet along with dread and secret torments, there is mingled such stupidity, that they boldly make a peremptory denial; but in the end, they gain nothing by their impudence but to expose their hidden wickedness.

Thus Judas, while he is restrained by an evil conscience, cannot remain silent; so dreadfully is he tormented, and, at the same time, overwhelmed with fear and anxiety, by that internal executioner. Christ, by indirectly glancing, in His reply, at the foolish rashness of Judas, urges him to consider the crime he wished to conceal; but his mind, already seized by diabolical rage, could not admit such a thought.

Let us learn from this example that the wicked, by bold defenses, do nothing more than draw down upon themselves a more sudden judgment.