John tells us in the 13th chapter of his gospel that Jesus, 'having loved his own which were in the world, he loved them unto the end." This is a preface for the second half of John's gospel. The first 12 chapters cover three years of Jesus's ministry, and the last nine chapters cover about a week. From this point until the arrest, Jesus is instructing and comforting his people. The first verse is an essential introduction to understanding what Christ Jesus says to his own. He loved His people and loved them to the end. He illustrates that love when he washes the disciples' feet. As the Godman loved His own in the world, He calls His disciples to love one another. But then, in John 13:16-20, Jesus tells the 12 that one of them is an imposter, a betrayer. One of them will "lift up the heel" against Him. We know it's Judas, but the disciples had no clue. Jesus dismisses Judas from the table and tells Him to go and do what he had committed to do. Judas leaves.
Jesus then said now was the time God would be glorified because Jesus is about to lay down His life as a substitute for the sins of His people, taking their place at Calvary's cross, the just for the unjust. He gives the 11 remaining disciples a new commandment, to love one another. Jesus, who will be leaving soon, who loved His own, tells His own to love each other. Not tracking with the Lord's message, Peter asks Jesus why he can't follow Him and presses the matter to the point Peter claimed he would die for Jesus. The Lord said not only will Peter not die for Jesus, but he'll also deny him three times.I listened to a sermon recently, and the preacher told his congregation that there were likely Judas' in the church. Not only God-haters, but hypocrites, who come to church and read their Bibles but don't really love Jesus. He held a standard of righteousness that people would have to meet, or otherwise, they are probably not even saved. He pointed people to follow godly examples of people who wouldn't betray the Lord. Don't be a Judas, be a Joseph. My question is, what's the difference between Judas and Peter? But is that the point? All the man said about Judas was equally valid of Peter. Peter listened to preaching, was always around Jesus, and confessed Him as Christ, but denied the Lord. Peter didn't live up to the standard the man set up to test if one was the real deal.
The only difference between Judas and Peter was the love of Jesus. Jesus loved Peter freely, completely, unconditionally, not because Peter was good, but because He chose to love him and loved him unto the end. The point is the marvelous grace found in the perfect Saviour. "If any man sin, we have an advocate with the Father, Jesus Christ the righteous."