John 3:1-17

We must not call that which God has cleansed unclean. We see His creation in part... He sees the whole.

Jesus’ work continues; His coming suffering and death is not the end, but the beginning. Although He is troubled by His coming death. He wants His disciples to have confidence in their knowledge that His death does not mark the end of His ministry. Jesus has known all along that Judas was (or would be) influenced by the devil to betray Him.In this moment, when facing Judas, Jesus is not encountering a mere demon; He is facing the one He has called the “murderer from the beginning” of time.  Jesus knows His identity in God, yet He will choose to die because of God’s love for people.

Cleansing rituals were part of everyday life for Jews of the first century. Jesus suggests that His work in the believer eliminates the need for repetitive cleansing. Faithlife Bible.

Jesus loved His disciples, even though He knew that one would betray Him, another would deny Him, and all would desert Him for a time. The washing was a symbol of spiritual cleansing. If Peter did not participate in the cleansing, he would not enjoy fellowship with Christ. Given Jesus’ dramatic statement, Peter had no choice but to submit. Only this time he went too far in the other direction. At first he wanted to tell the Lord what to do (v. 8). Now he wanted to dictate the manner in which Jesus did it. But Jesus told him he did not need a bath; he only needed Jesus to wash his feet that were dusty from the road. This is symbolic. A believer has already been “cleansed.” He or she only needs the cleansing of daily sins that comes through confession. Thus Jesus’ washing of the disciples’ feet not only is a model of service, but it represents the ultimate in service—forgiveness of sins.

 The Lord was using His practical action to give an example of love to His disciples. NKJ Bible.

John 13:1–17 (NKJV)

 Now before the Feast of the Passover, when Jesus knew that His hour had come that He should depart from this world to the Father, having loved His own who were in the world, He loved them to the end. And supper being ended, the devil having already put it into the heart of Judas Iscariot, Simon’s son, to betray Him, Jesus, knowing that the Father had given all things into His hands, and that He had come from God and was going to God, rose from supper and laid aside His garments, took a towel and girded Himself. After that, He poured water into a basin and began to wash the disciples’ feet, and to wipe them with the towel with which He was girded. Then He came to Simon Peter. And Peter said to Him, “Lord, are You washing my feet?”Jesus answered and said to him, “What I am doing you do not understand now, but you will know after this.”Peter said to Him, “You shall never wash my feet!”Jesus answered him, “If I do not wash you, you have no part with Me.”Simon Peter said to Him, “Lord, not my feet only, but also my hands and my head!”Jesus said to him, “He who is bathed needs only to wash his feet, but is completely clean; and you are clean, but not all of you.” For He knew who would betray Him; therefore He said, “You are not all clean.”So when He had washed their feet, taken His garments, and sat down again, He said to them, “Do you know what I have done to you? You call Me Teacher and Lord, and you say well, for so I am. If I then, your Lord and Teacher, have washed your feet, you also ought to wash one another’s feet. For I have given you an example, that you should do as I have done to you. Most assuredly, I say to you, a servant is not greater than his master; nor is he who is sent greater than he who sent him. If you know these things, blessed are you if you do them.

1 Corinthians 12:3 (NKJV): 

Therefore I make known to you that no one speaking by the Spirit of God calls Jesus accursed, and no one can say that Jesus is Lord except by the Holy Spirit.

Phillip 2:11

and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father