Everyone who is called by My name, whom I have created for My glory; I have formed him, yes, I have made him. -- Isaiah 43:7
When a Jewish family is getting ready to celebrate the Passover, they follow the command to rid the household of all leaven (or yeast). This doesn't just mean they take the package of baker's yeast out of the cupboard and throw it away. It doesn't just mean that they discard all the sliced bread, biscuits, rolls, croutons, or any other bread-like food (such as cookies, cakes, crackers and the like).
What it actually means is that they thoroughly sweep up all the crumbs, not just from the kitchen, but throughout the entire house. When they are done, there should be no chance of any leaven left in the house. By accomplishing this, they also rid the home of dust, grime, and grit. It is a thorough cleaning.
Why do they go to all this trouble? They do it because God commanded it in Exodus 12:19-20. They do it because "a little leaven leavens the whole lump" (Galatians 5:9). In short, they do it to glorify God.
When Jesus and the disciples were celebrating their Passover meal in John 13, there was great joy and true worship only when Judas the betrayer left.
So, when he (Judas) had gone out, Jesus said, "Now the Son of man is glorified, and God is glorified in Him. If God is glorified in Him, God will also glorify Him in Himself, and glorify Him immediately. (John 13:31-32)
Like the Jewish family who swept the entire house in order to remove every crumb that might contain leaven, so we see that when Jesus dismissed Judas, only then could true worship and God-centered fellowship begin. It is true that we are commanded to go "into all the world" and preach the Gospel, it is also true that the fellowship of believers (the Church) should be free of all who would distract or detract from true Christian fellowship. True worship begins when the chosen children of God are exclusively present, and there is no corrupt outside influence.
Here is how the Bible commentary by Jamieson, Fausset & Brown puts it:
These remarkable words plainly imply that up to this moment our Lord had spoken under a painful restraint, the presence of a traitor within the little circle of His holiest fellowship on earth preventing the free and full outpouring of His heart; as is evident, indeed, from those oft-recurring clauses, "Ye are not all clean," "I speak not of you all," &c. "Now" the restraint is removed, and the embankment which kept in the mighty volume of living waters having broken down, they burst forth in a torrent which only ceases on His leaving the supper room and entering on the next stage of His great work--the scene in the Garden. But with what words is the silence first broken on the departure of Judas? By no reflections on the traitor, and, what is still more wonderful, by no reference to the dread character of His own approaching sufferings. He does not even name them, save by announcing, as with a burst of triumph, that the hour of His glory has arrived! And what is very remarkable, in five brief clauses He repeats this word "glorify" five times, as if to His view a coruscation of glories played at that moment about the Cross.The words that Jesus spoke about the glory of God and His own glory are in some ways poetic. The New Cambridge Bible Commentary says, "Jesus' remark on 'glory' is chiastic in shape:
A. The Son of Man has been glorified.
B. and God has been glorified in Him.
B'. If God has been glorified in Him,
A'. God will also glorify Him in Himself and will glorify Him at once.
In the 'A' parts, God acts to glorify the Son of Man, whereas in the 'B' parts, God in turn is honored by the obedient Son." In our worship, we glorify God: we praise Him for His works, we study His words and apply them to our lives, and we ask Him for grace and forgiveness. In turn, God glorifies Himself in us, so that when we go out into the world, we can be set apart for Him.
Next, Jesus begins to teach His true disciples how to be truly set apart.
Little children, I shall be with you a little while longer. You will seek Me; and as I said to the Jews, "Where I am going, you cannot come," so now I say to you. A new commandment I give to you, that you love one another; as I have loved you, that you also love one another. By this all will know that you are My disciples, if you have love for one another. (John 13:33-35)
Notice that Jesus is speaking exclusively to the disciples. There are no Judases in the room, no outside influences, no unbelievers present. The fresh word He has for them in this place and in this hour is that they should love one another. This is not to say we should not love the world, for we know that God so loved the world that He gave His only Son. However, there should be a special bond, a higher love, between believers. Charles Spurgeon put it this way: "We are to love our neighbor as ourselves, but we are to love our fellow Christians as Christ loved us, and that is far more than we love ourselves."
Too often professing Christians get caught up in the politics of Diversity, Equity, and Inclusion, so much that we embrace people who identify with sinful practices and show pride in their sinful actions. To truly love those caught up in sin means to call out their sin, either for confession and repentance, or for godly discipline and excommunication, for the good of the Church first and then for the individual's salvation. Being loving doesn't mean accepting people for who they are; it means calling them to Christ for washing and cleansing and then forgiving.
Scottish Bible scholar FF Bruce wrote, "So Tertullian reports the pagans of his day (a century after this Gospel was published) as saying of Christians, ‘See how they love one another!’" They did not say, "See how they love us pagans". Nor did they exclaim, "see how they accept and incorporate our pagan practices." There is a difference.
Sometimes we miss the point.
In the next section, we see that Peter missed the point, as well.
Simon Peter said to Him, "Lord, where are You going?" Jesus answered him, "Where I am going you cannot follow Me now, but you shall follow Me afterward." Peter said to Him, "Lord, why can I not follow You now? I will lay down my life for Your sake." Jesus answered him, "Will you lay down your life for My sake? Most assuredly, I say to you, the rooster shall not crow till you have denied Me three times." (John 13:36-38)
I like how N.T. Wright puts it in his commentary John for Everyone:
Like a child returning to the question it wanted to ask after the conversation has moved on elsewhere, Peter harks back to what Jesus said in verse 33, even though verses 34 and 35 contain some of the most beautiful and challenging words ever spoken. Once again he and Jesus banter to and fro, with Peter blustering away and saying whatever comes into his head. This time, though, the conversation suddenly runs into a brick wall. Peter doesn't realize what he's said. "Where are you going? I'll follow You! I want to follow You! I'll lay down my life for You."
"Will you really, Peter?" replies Jesus, and we can see the soft, sad smile as He says it. "Is it really you that's going to lay down your life for Me? Have you forgotten what I said about the shepherd and the sheep? Actually, Peter, I hate to say it, but what you are about to do is something rather different."
We love Peter because he is so like the rest of us. And we love Jesus because He is so gentle and loving with him, even within the sadness and the challenge and the glory that is to come. And once again we pause and reflect on how, in the strange purpose of God, love and betrayal, glory and denial, go so closely together.
I also appreciate the way it is presented in The New Cambridge Bible Commentary:
We interpreted the footwashing in 13:4-11 as a status-transforming ritual. If all goes well, the candidates will be changed by becoming "wholly clean" and by having "a share with Me." Thus they will be prepared for the death of Jesus, either by physically sharing in it or by being participants in Jesus' own arrest, trial, and death. Who undergoes this ritual and how do they fare?
Peter: Footwashing transformation ritual: still a candidate; failed loyalty to Jesus=failed transformation.
Judas: Footwashing transformation ritual: never a candidate; hostility to Jesus=no possible status transformation ("One is not clean")
John: Footwashing transformation ritual: successful candidate; courage to enter Annas' place and stand at the foot of the cross=successful transformation.
Moreover, is there a role transformation beyond a status change? When Peter boasts "I will lay down my life for you" (13:37), he makes the same claim that the Noble Shepherd repeatedly made in 10:11-15, namely that "The noble shepherd lays down his life for the sheep." A role is in view here: "shepherd" of the flock. Jesus challenges Peter's claim, effectively declaring that Peter has failed the test for being a "shepherd" as of this time; rather, he resembles the "hireling" instead. Moreover, there are several episodes coming in which Peter acts as a sheep, not a shepherd (18:15-18). Only later does Jesus declare him qualified for the transformation into a role of shepherd (21:15-19).
Jesus does not give up on Peter like He did Judas. He does not banish Peter from the flock. Jesus gives him another chance. I have a friend who is an attorney. He is a fine attorney, and very successful. However, he did not pass the bar exam on the first try. He had to go back and study after his initial failure, in order to pass the test on the next try. In this way Peter also was given the opportunity to learn, under the leadership of Jesus and of the Holy Spirit, to be a shepherd in the service of God.
It takes discernment to properly identify and deal with Judases and Peters in our flock. The role of a Pastor is not an easy one. We should pray for discernment, pray for our pastoral staff, and pray that our churches will show love for the congregation such that the world will be drawn to them, not to bring the churches down to their level, but to elevate the seekers so that they can engage in true worship.