Why Jesus Washed the Disciples' Feet in John 13
Jesus washed his disciples' feet as the Lord and Teacher taking the servant's place, showing his love to the end and giving an example his followers are to copy. The washing also carries cleansing and belonging, which is why Peter's refusal matters.
Why Jesus Washed His Disciples' Feet
Jesus washed his disciples' feet to show the full extent of his love and to leave a pattern of lowly service. The washing reveals who he is before it commands what his followers do.
Jesus Washes the Disciples' Feet: John 13 Meaning
Jesus knew where he came from and where he was going, and with that authority he took a towel and washed his disciples' feet, including the feet of the man who would betray him. He gave that action as a pattern, and he placed the blessing in doing what his followers know, not in knowing it.