After washing their feet, he put on his robe again and sad down and asked, “Do you understand what I was doing? You call me “Teacher’ and ‘Lord,’ and you are right, because it is true. And since I, the Lord and Teacher, have washed your feet, you ought to wash each other’s feet. I have given you an example to follow. Do as I have given you an example to follow. Do as I have done to you.” John 13:12-15
Jesus did not wash his disciples’ feet just to get them to be nice to each other. His far greater goal was to extend his mission on earth after he was gone. These men were to move into the world serving all people to whom they took the message of salvation.