31 As soon as Judas left the room, Jesus said, "The time has come for the Son of Man to enter into his glory, and God will be glorified because of him. 32 And since God receives glory because of the Son, he will give his own glory to the Son, and he will do so at once. 33 Dear children, I will be with you only a little longer. And as I told the Jewish leaders, you will search for me, but you can't come where I am going. 34 So now I am giving you a new commandment: Love each other. Just as I have loved you, you should love each other. 35 Your love for one another will prove to the world that you are my disciples."
36 Simon Peter asked, "Lord, where are you going?" And Jesus replied, "You can't go with me now, but you will follow me later." 37 "But why can't I come now, Lord?" he asked. "I'm ready to die for you." 38 Jesus answered, "Die for me? I tell you the truth, Peter-before the rooster crows tomorrow morning, you will deny three times that you even know me.
Matthew Henry's Commentary on John 13:31-38
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.
Commentary on John 13:36-38
(Read John 13:36-38)
What Christ had said concerning brotherly love, Peter overlooked, but spoke of that about which Christ kept them ignorant. It is common to be more eager to know about secret things, which belong to God only, than about things revealed, which belong to us and our children; to be more desirous to have our curiosity gratified, than our consciences directed; to know what is done in heaven, than what we may do to get thither. How soon discourse as to what is plain and edifying is dropped, while a doubtful dispute runs on into endless strife of words! We are apt to take it amiss to be told we cannot do this and the other, whereas, without Christ we can do nothing. Christ knows us better than we know ourselves, and has many ways of discovering those to themselves, whom he loves, and he will hide pride from them. May we endeavour to keep the unity of the Spirit in the bond of peace, to love one another with a pure heart fervently, and to walk humbly with our God.