12When he had washed their feet and put on his outer garments and resumed his place, he said to them, "Do you understand what I have done to you? 13You call me Teacher and Lord, and you are right, for so I am. 14If I then, your Lord and Teacher, have washed your feet, you also ought to wash one another's feet. 15For I have given you an example, that you also should do just as I have done to you. 16Truly, truly, I say to you, a servant is not greater than his master, nor is a messenger greater than the one who sent him.