George Leo Haydock

You also ought to wash one another’s feet. Not that he made this a standing precept according to the letter; but designed it as a lesson of humility. We find this custom literally observed in several churches, as it is now done every year by diverse prelates, and by Christian kings and princes. (Witham) — He gives us an example of a more elevated act of virtue, that we may at least learn to practise the lower degrees of it. For he indeed was their Lord, but when we perform this office, we can but do it to our fellow-servants. (St. Chrysostom, hom. lxx. in Joan.) — This it is, blessed Peter, which you were ignorant of, but which he promises to explain afterwards. (St. Augustine, tract. 58. in Joan.)