21 After saying this Jesus was troubled in spirit, and declared, "Very truly, I tell you, one of you will betray me." 22 The disciples looked at one another, uncertain of whom he was speaking. 23 One of his disciples-the one whom Jesus loved-was reclining next to him; 24 Simon Peter therefore motioned to him to ask Jesus of whom he was speaking. 25 So while reclining next to Jesus, he asked him, "Lord, who is it?" 26 Jesus answered, "It is the one to whom I give this piece of bread when I have dipped it in the dish." So when he had dipped the piece of bread, he gave it to Judas son of Simon Iscariot. 27 After he received the piece of bread, Satan entered into him. Jesus said to him, "Do quickly what you are going to do." 28 Now no one at the table knew why he said this to him. 29 Some thought that, because Judas had the common purse, Jesus was telling him, "Buy what we need for the festival"; or, that he should give something to the poor. 30 So, after receiving the piece of bread, he immediately went out. And it was night.
31 When he had gone out, Jesus said, "Now the Son of Man has been glorified, and God has been glorified in him. 32 If God has been glorified in him, God will also glorify him in himself and will glorify him at once. 33 Little children, I am with you only a little longer. You will look for me; and as I said to the Jews so now I say to you, "Where I am going, you cannot come.' 34 I give you a new commandment, that you love one another. Just as I have loved you, you also should love one another. 35 By this everyone will know that you are my disciples, if you have love for one another."
Matthew Henry's Commentary on John 13:21-35
Commentary on John 13:18-30
(Read John 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.
Commentary on John 13:31-35
(Read John 13:31-35)
Christ had been glorified in many miracles he wrought, yet he speaks of his being glorified now in his sufferings, as if that were more than all his other glories in his humbled state. Satisfaction was thereby made for the wrong done to God by the sin of man. We cannot now follow our Lord to his heavenly happiness, but if we truly believe in him, we shall follow him hereafter; meanwhile we must wait his time, and do his work. Before Christ left the disciples, he would give them a new commandment. They were to love each other for Christ's sake, and according to his example, seeking what might benefit others, and promoting the cause of the gospel, as one body, animated by one soul. But this commandment still appears new to many professors. Men in general notice any of Christ's words rather than these. By this it appears, that if the followers of Christ do not show love one to another, they give cause to suspect their sincerity.