2 Having then found Him in the wilderness, and in a pathless wilderness (for that the wilderness was such, Mark has declared, saying, that He “was with the wild beasts”), behold with how much craft he draws near, and wickedness; and for what sort of opportunity he watches. For not in his fast, but in his hunger he approaches Him; to instruct you how great a good fasting is, and how it is a most powerful shield against the devil, and that after the font, men should give themselves up, not to luxury and drunkenness, and a full table, but to fasting. For, for this cause even He fasted, not as needing it Himself, but to instruct us. Thus, since our sins before the font were brought in by serving the belly: much as if any one who had made a sick man whole were to forbid his doing those things, from which the distemper arose; so we see here likewise that He Himself after the font brought in fasting. For indeed both Adam by the incontinence of the belly was cast out of paradise; and the flood in Noah's time, this produced; and this brought down the thunders on Sodom. For although there was also a charge of whoredom, nevertheless from this grew the root of each of those punishments; which Ezekiel also signified when he said, “But this was the iniquity of Sodom, that she waxed wanton in pride and in fullness of bread, and in abundance of luxury.” Thus the Jews also per petrated the greatest wickedness, being driven upon transgression by their drunkenness and delicacy.
On this account then even He too fasts forty days, pointing out to us the medicines of our salvation; yet proceeds no further, lest on the other hand, through the exceeding greatness of the miracle the truth of His Economy should be discredited. For as it is, this cannot be, seeing that both Moses and Elias, anticipating Him, could advance to so great a length of time, strengthened by the power of God. And if He had proceeded farther, from this among other things His assumption of our flesh would have seemed incredible to many.
Having then fasted forty days and as many nights,
“He was afterwards an hungered;” affording him a point to lay hold of and approach, that by actual conflict He might show how to prevail and be victorious. Just so do wrestlers also: when teaching their pupils how to prevail and overcome, they voluntarily in the lists engage with others, to afford these in the persons of their antagonists the means of seeing and learning the mode of conquest. Which same thing then also took place. For it being His will to draw him on so far, He both made His hunger known to him, and awaited his approach, and as He waited for him, so He dashed him to earth, once, twice, and three times, with such ease as became Him.
Source: Homilies on the Gospel of St. Matthew (New Advent)