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. […]

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.

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

(ap. Anselm.) This desert is that between Jerusalem and Jericho, where the robbers used to resort. It is called Hammaim, i. e. 'of blood,' from the bloodshed which these robbers caused there; hence the man was said (in the parable) to have fallen among robbers as he went down from Jerusalem to Jericho, bearing a figure of Adam, who was overcome by dæmons. It was therefore fit that the place where Christ overcame the Devil, should be the same in which the Devil in the parable overcomes man.

(Hom. in. Ev. 16.1.) Some doubt what Spirit it was that led Jesus into the desert, for that it is said after, The Devil took him into the holy city. But true and without question agreeable to the context is the received opinion, that it was the Holy Spirit; that His own Spirit should lead Him thither where the evil spirit should find Him to try Him. (ubi sup.) We should know that there are three modes of temptation; suggestion, delight, and consent; and we when we are tempted commonly fall into delight or consent, because being born of the sin of the flesh, we bear with us whence we afford strength for the contest; but God who incarnate in the Virgin's womb came into the world without sin, carried within Him nothing of a contrary nature. He could then be tempted by suggestion; but the delight of sin never gnawed His soul, and therefore all that temptation of the Devil was without not within Him. (Hom. in. Ev. 16. 5.) The Creator of all things took no food whatever during forty days. We also, at the season of Lent as much as in us lies afflict our flesh by abstinence. The number forty is preserved, because the virtue of the decalogue is fulfilled in the books of the holy Gospel; and ten taken four times amounts to forty. Or, because in this mortal body we consist of four elements by the delights of which we go against the Lord's precepts received by the decalogue. And as we transgress the decalogue through the lusts of this flesh, it is fitting that we afflict the flesh forty-fold. Or, as by the Law we offer the tenth of our goods, so we strive to offer the tenth of our time. And from the first Sunday of Lent to the rejoicing of the paschal festival is a space of six weeks, or forty-two days, subtracting from which the six Sundays which are not kept there remain thirty-six. […]

And when He had fasted. He fasted to show us that fasting is a great weapon against temptations, just as the love of delicacies was the beginning of all sin. Forty days and forty nights. He fasts as long as Moses and Elijah did, for …

But since the reading is fitting for these days—for we have heard of the forty days' abstinence of our Redeemer as we begin the season of Lent—we must discuss why this very abstinence is observed for the number of forty days. For Moses fasted twice for forty days in order to receive the law. Elijah abstained for forty days in the desert. The very Author of humanity, coming to humanity, took no food at all for forty days. Let us also, as much as we can, strive to afflict our flesh through abstinence during the annual season of Lent. Why then is the number forty observed in abstinence, unless because the power of the Decalogue is fulfilled through the four books of the holy Gospel? For ten multiplied by four produces forty, because we fulfill the commandments of the Decalogue when we indeed keep the four books of the holy Gospel. From this another meaning can also be perceived. For in this mortal body we subsist from four elements, and through the pleasures of this same body we act contrary to the Lord's commandments. But the Lord's commandments were received through the Decalogue. Since therefore through the desires of the flesh we have despised the commandments of the Decalogue, it is fitting that we afflict that same flesh four times ten. Although concerning this season of Lent there is still another thing that can be understood. For from the present day until the joys of the Paschal solemnity, six weeks come, whose days indeed amount to forty-two. When the six Sundays are subtracted from the abstinence, no more than thirty-six days remain in abstinence. […]

Then the second prelude is given, namely, the fast. And when he had fasted..., which suits both the past and the future: the past, because it is fitting for one to fast after baptism, since he should not take his ease after baptism but should …

And when he had fasted forty days..... As Moses did, when he was about to deliver the law to the Israelites, Exo 34:28 and as Elijah did, when he bore his testimony for the Lord of hosts, 1Ki 19:8 so did Christ, when he was about to publish the Gospel of his grace, and bear witness to the truth.

And when he had fasted forty days - It is remarkable that Moses, the great lawgiver of the Jews, previously to his receiving the law from God, fasted forty days in the mount; that Elijah, the chief of the prophets, fasted also forty days; and that Christ, the giver of the New Covenant, should act in the same way. Was not all this intended to show, that God’s kingdom on earth was to be spiritual and Divine? - that it should not consist in meat and drink, but in righteousness, peace, and joy in the Holy Ghost? Rom 14:

So it was apparently with Moses (Ex 34:28) and Elijah (1Ki 19:8) for the same period. A supernatural power of endurance was of course imparted to the body, but this probably operated through a natural law--the absorption of the Redeemer's Spirit in the dread conflict with the tempter. Had we only this Gospel, we should suppose the temptation did not begin till after this.

The first event in our Lord’s ministry which St. Matthew records after his baptism is his temptation. This is a deep and mysterious subject. There is much in the history of it which we cannot explain; but there lie on the face of the history plain practical lessons, to which we should do well to take heed. Let us learn in the first place, what a real and mighty enemy we have in the devil. He is not afraid to assault even the Lord Jesus himself.

The first event in our Lord’s ministry which St. Matthew records after his baptism is his temptation. This is a deep and mysterious subject. There is much in the history of it which we cannot explain; but there lie on the face of the history plain practical lessons, to which we should do well to take heed. Let us learn in the first place, what a real and mighty enemy we have in the devil. He is not afraid to assault even the Lord Jesus himself. Three times over he attacks God’s own Son: our Saviour was “tempted of the devil.” It was the devil who brought sin into the world at the beginning. This is he who vexed Job, deceived David, and gave Peter a heavy fall: this is he whom the Bible calls a “murderer,” a “liar,” and a “roaring lion” ( John 8:44 ; 1 Peter 5:8 ); this is he whose enmity to our souls never slumbers and never sleeps; this is he who for nearly 6,000 years has been working at one work, to ruin men and women and to draw them to hell; this is he whose cunning and subtlety pass man’s understanding, and who often “appears an angel of light.” ( 1 Corinthians 11:14 ) Let us watch and pray daily against his devices. There is no enemy worse than an enemy who is never seen and never dies, who is near us wherever we live, and goes with us wherever we go. Not least, let us beware of that habit of foolish talking and jesting about the devil which so unhappily common. Let us remember that if we would be saved we must not only crucify the flesh and overcome the world, but also “resist the devil.” Let us learn in the next place that we must not count temptation a strange thing. “The disciple is not greater than his master, nor the servant than his Lord.” If Satan came to Christ, he will also come to Christians. It would be well for believers if they would remember this. They are too apt to forget it.

Had fasted - Abstained from food. Forty days and forty nights - It has been questioned by some whether Christ abstained wholly from food, or only from the food to which he was accustomed. Luke says Luk 4:2 that he ate nothing. This settles the question. Mark says Mar 1:13 that angels came and ministered unto him. At first view this would seem to imply that he did eat during that time. But Mark does not mention the time when the angels performed this office of kindness, and we are at liberty to suppose that he means to say that it was done at the close of the 40 days; and the rather as Matthew, after giving an account of the temptation, says the same thing Mat 4:2. There are other instances of persons fasting 40 days recorded in the Scriptures. Thus, Moses fasted 40 days, Exo 34:28. Elijah also fasted the same length of time, 1Ki 19:8. In these cases they were no doubt miraculously supported.

Jesus didn't argue. He quoted Scripture—every time. That's our model. We don't overcome with cleverness or willpower. We overcome by knowing and declaring God's Word.