What God hath cleansed, that call not thou common

        To say that "He even washed the feet of Judas Iscariot" is like to say "He even died for sinners."

        It is a sign that the speaker lacks even basic understanding of the work of God.
 
       A key to understanding the footwashing was given to Peter, who thought that the footwashing was the common act of the removal of physical dirt.

        Jesus told him that he didn't understand what he was doing. This key directs our insight away from that common understanding.
 
        Furthermore, Jesus told Peter that they (the disciples) were not all clean.

        The evangelist tells us that he said it because he knew who should betray him.
 
        Finally, Jesus associated the uncleanness of the betrayer with the foot of the betrayer, "He ... hath lifted up his heel against me."
 
        Putting it all together, the footwashing was about cleansing the heel that was lifted up against Jesus.

        It was Jesus' way of telling Judas that he was forgiven for his trespass against him.
 
        And lest we gainsay this understanding of the footwashing, we have another key given to us through Peter.

        "What God hath cleansed, that call not thou common."

        I offer these words only in my own name.