John 13:6

6. Cometh he to Simon Peter The language implies that he had washed several without opposition until he comes to Peter. Peter, therefore, clearly, was not the first washed; but he is the first and only one whose impulsive nature prompts a refusal.

Dost thou wash my feet? The emphatic words here are thou and my. Dost thou, my God incarnate, wash my feet, who am unholy? Peter, therefore, means to exhibit humility before his Lord. But it is a noisy, self-sufficient humility, inferior to and less than the silent submission of the other disciples to their Lord. But Peter must display his humility, and so deteriorates it.