"When he had washed their feet and put on his clothes again he went back to the table. ‘Do you understand’ he said ‘what I have done to you? You call me Master and Lord, and rightly; so I am. If I, then, the Lord and Master, have washed your feet, you should wash each other’s feet. I have given you an example so that you may copy what I have done to you.’"
- John 13:12-15.
This stained glass detail from Ampleforth Abbey shows St Thomas of Canterbury following the Lord's commandment of service.