We have three enemies to fight against; our soul has three dangers; for, as the Beloved Disciple says: All that is in the world, is the concupiscence of the flesh, and the concupiscence of the eyes, and the pride of life! [1 St. John, ii. 16].
By the concupiscence of the flesh, is meant the love of sensual things, which covets whatever is agreeable to the flesh, and, when not curbed, draws the soul into unlawful pleasures. Concupiscence of the eyes expresses the love of the goods of this world, such as riches, and possessions; these dazzle the eye, and then seduce the heart. Pride of life is that confidence in ourselves, which leads us to be vain and presumptuous, and makes us forget that all we have, - our life and every good gift, - we have from God.
Not one of our sins but what comes from one of these three sources; not one of our temptations but what aims at making us accept the concupiscence of the flesh, or the concupiscence of the eyes, or the pride of life. Our Saviour, then, who would be our model in all things, deigned to subject himself to these three temptations.
First of all, Satan tempts him in what regards the Flesh:- he suggests to him to satisfy the cravings of hunger, by working a miracle, and changing the stones into bread. If Jesus consent, and show an eagerness in giving this indulgence to his body, the tempter will conclude that he is but a frail mortal, subject to concupiscence like other men. When he tempts us, who have inherited evil concupiscence from Adam, his suggestions go further than this; he endeavours to defile the soul by the body. But the sovereign holiness of the Incarnate Word could never permit Satan to use upon Him the power which he has received of tempting man in his outward senses. The lesson, therefore, which the Son of God here gives us, is one of temperance: but we know, that, for us, temperance is the mother of purity, and that intemperance excites our senses to rebel.
The second temptation is to pride; Cast thyself down; the Angels shall bear thee up in their hands. The enemy is anxious to see if the favours of heaven have produced in Jesus’ soul that haughtiness, that ungrateful self-confidence, which makes the creature arrogate God’s gifts to itself, and forget its benefactor. Here, also, he is foiled; our Redeemer’s humility confounds the pride of the rebel angel.
He then makes a last effort: he hopes to gain over by ambition Him who has given such proofs of temperance and humility. He shows him all the kingdoms of the world, and the glory of them; and says to him: All these will I give thee, if falling down, thou wilt adore me. Jesus rejects the wretched offer, and drives from him the seducer, the prince of this world [St. John, xiv. 30]; hereby teaching us, that we must despise the riches of this world, as often as our keeping or getting them is to be on the condition of our violating the law of God and paying homage to Satan.
But, let us observe how it is, that our Divine Model, our Redeemer, overcomes the tempter. Does be hearken to his words? Does he allow the temptation time? and give it strength by delay? We did so, when we were tempted, and we fell. But our Lord immediately meets each temptation with the shield of God’s word. He says: It is written: Not on bread alone doth man live. - It is written: Thou shalt not tempt the Lord thy God. - It is written: The Lord thy God shalt thou adore, and Him only shalt thou serve. - This, then, must be our practice for the time to come. Eve brought perdition on herself, and on the whole human race, because she listened to the serpent. He that dallies with temptation, is sure to fall. We are now in a Season of extraordinary grace; our hearts are on the watch, dangerous occasions are removed, everything that savours of worldliness is laid aside; our souls, purified by prayer, fasting, and almsdeeds, are to rise with Christ, to a new life;- but, shall we persevere? All depends upon how we behave under temptation. Here, at the very opening of Lent, the Church gives us this passage of the Holy Gospel, that we may have, not only precept, but example. If we be attentive and faithful, the lesson she gives us will produce its fruit; and when we come to the Easter Solemnity, we shall have those sure pledges of perseverance, - vigilance, self-diffidence, prayer, and the never-failing help of Divine Grace.1
— Dom Prosper Gueranger
https://sensusfidelium.com/the-liturgical-year-dom-prosper-gueranger/lent/first-sunday-of-lent/