6 Then He came to Simon Peter. And Peter said to Him, "Lord, are You washing my feet?"
7 Jesus answered and said to him, "What I am doing you do not understand now, but you will know after this."
8 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."
9 Simon Peter said to Him, "Lord, not my feet only, but also my hands and my head!"
10 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."
11 For He knew who would betray Him; therefore He said, "You are not all clean."
Are You washing my feet (v. 6) emphasis in original Greek
after this (v. 7) — after the Spirit had come and made things clear
part (v.8) — fellowship, new nature communion (2 Corinthians 6:15)
he who is bathed (v. 10) — the new birth, regeneration by water (the Word) and the Spirit (Titus 3:5). Once accomplished, it cannot be repeated.
needs only to wash his feet (v. 10) — referring to the believer's walk which needs the cleansing of the Word (Ephesians 5:225-26). But the believer needs no further washing because, before God, he is spotless.
The first "washing" in verse 10 is from the Greek word for "bathed" (Hebrews 10:14; Colossians 1:12). The second washing is from the Greek word for "cleaning the extremities."
Is it not most significant that nothing is said in this chapter about the washing of the disciples' hands? Does it not point to a leading contrast between the Mosaic and the [grace] dispensations? Under the law, where there was so much of doing the priests were required to wash both their hands and their feet (Exodus 30:19); but under grace all has been done for us, and if the walk be right, the work will be acceptable! — Expositions of the Gospel of John, by Arthur W. Pink, page 306.
This same distinction was plainly marked in the Old Testament. When Aaron and his sons were consecrated, they were bathed all over (Exodus 29:4; Leviticus 8:6); but at the laver it was only their hands and feet which were daily cleaned (Exodus 30:19-21). — Expositions of the Gospel of John, by Arthur W. Pink, page 308