As soon as they have received the first answer from Christ, they proceed from one thing to another, with the intent to shew that the holy disciples, and Jesus Himself with them, cared very little for the law. Hence it follows, Why do the disciples of John fast, but thine eat, &c. (Lev. 15, prævaricationis.) As if they said, Ye eat with publicans and sinners, whereas the law forbids to have any fellowship with the unclean, but compassion comes in as an excuse for your transgression; why then do ye not fast, as they are wont to do who wish to live according to the law? But holy men indeed fast, that by the mortification of their body they may quell its passions. Christ needed not fasting for the perfecting of virtue, since as God He was free from every yoke of passion. Nor again did His companions need fasting, but being made partakers of His grace without fasting they were strengthened in all holy and godly living. For when Christ fasted for forty days, it was not to mortify His passions, but to manifest to carnal men the rule of abstinence.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).