Matthew 4:2

Having then found Him in the wilderness, and in a pathless wilderness (for that the wilderness was such, Mark hath 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 thee 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 perpetrated 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 wrestlets 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.

(Lib. 83. Quest. q. 81.) Otherwise; The sum of all wisdom is to be acquainted with the Creator and the creature. The Creator is the Trinity, Father, Son, and Holy Ghost; the creature is partly invisible,—as the soul to which we assign a threefold nature, (as in the command to love God with the whole heart, mind, and soul,)—partly visible as the body, which we divide into four elements; the hot, the cold, the liquid, the solid. The number ten then, which stands for the whole law of life, taken four times, that is, multiplied by that number which we assign for the body, because by the body the law is obeyed or disobeyed, makes the number forty. All the aliquot parts in this number, viz. 1, 2, 4, 5, 8, 10, 20, taken together make up the number 50. Hence the time of our sorrow and affliction is fixed at forty days; the state of blessed joy which shall be hereafter is figured in the quinquagesimal festival, i. e. the fifty days from Easter to Pentecost. (Serm. 210. 2.) Not however because Christ fasted immediately after having received baptism, are we to suppose that He established a rule to be observed, that we should fast immediately after His baptism. But when the conflict with the tempter is sore, then we ought to fast, as the body may fulfil its warfare by chastisement, and the soul obtain victory by humiliation.

The Devil's snares are chiefly spread for the sanctified, because a victory over the saints is more desired than over others. He was an hungred, not during the forty days, but after them. Therefore when the Lord hungred, it was not that the effects of abstinence then first came upon Him, but that His humanity was left to its own strength. For the Devil was to be overcome, not by the God, but by the flesh. By this was figured, that after those forty days which He was to tarry on earth after His passion were accomplished, He should hunger for the salvation of man, at which time He carried back again to God His Father the expected gift, the humanity which He had taken on Him.

(Hom. xiii.) Whoever thou art then that after thy baptism sufferest grievous trials, be not troubled thereat; for this thou receivedst arms, to fight, not to sit idle. God does not hold all trial from us; first, that we may feel that we are become stronger; secondly, that we may not be puffed up by the greatness of the gifts we have received; thirdly, that the Devil may have experience that we have entirely renounced him; fourthly, that by it we may be made stronger; fifthly, that we may receive a sign of the treasure entrusted to us; for the Devil would not come upon us to tempt us, did he not see us advanced to greater honours. The Devil is wont to be most urgent with temptation, when he sees us solitary; thus it was in the beginning he tempted the woman when he found her without the man, and now too the occasion is offered to the Devil, by the Saviour's being led into the desert. But that you may learn how great a good is fasting, and what a mighty shield against the Devil, and that after baptism you ought to give attention to fasting and not to lusts, therefore Christ fasted, not Himself needing it, but teaching us by His example. But He exceeded not the measure of Moses and Elias, lest it should bring into doubt the reality of His assumption of the flesh.

Led, not against His will, or as a prisoner, but as by a desire for the conflict.