2. Now the Lord would not have recapitulated in Himself that ancient and primary enmity against the serpent, fulfilling the promise of the Creator (Demiurgi), and performing His command, if He had come from another Father. But as He is one and the same, who formed us at the beginning, and sent His Son at the end, the Lord did perform His command, being made of a woman, by both destroying our adversary, and perfecting man after the image and likeness of God. And for this reason He did not draw the means of confounding him from any other source than from the words of the law, and made use of the Father's commandment as a help towards the destruction and confusion of the apostate angel. Fasting forty days, like Moses and Elias, He afterwards hungered, first, in order that we may perceive that He was a real and substantial man—for it belongs to a man to suffer hunger when fasting; and secondly, that His opponent might have an opportunity of attacking Him. For as at the beginning it was by means of food that [the enemy] persuaded man, although not suffering hunger, to transgress God's commandments, so in the end he did not succeed in persuading Him that was an hungered to take that food which proceeded from God. For, when tempting Him, he said, "If thou be the Son of God, command that these stones be made bread." But the Lord repulsed him by the commandment of the law, saying, "It is written, Man doth not live by bread alone." As to those words [of His enemy,] "If thou be the Son of God," [the Lord] made no remark; but by thus acknowledging His human nature He baffled His adversary, and exhausted the force of his first attack by means of His Father's word. The corruption of man, therefore, which occurred in paradise by both [of our first parents] eating, was done away with by [the Lord's] want of food in this world. But he, being thus vanquished by the law, endeavoured again to make an assault by himself quoting a commandment of the law. For, bringing Him to the highest pinnacle of the temple, he said to Him, "If thou art the Son of God, cast thyself down. For it is written, That God shall give His angels charge concerning thee, and in their hands they shall bear thee up, lest perchance thou dash thy foot against a stone;" thus concealing a falsehood under the guise of Scripture, as is done by all the heretics. For that was indeed written, [namely], "That He hath given His angels charge concerning Him;" but "cast thyself down from hence" no Scripture said in reference to Him: this kind of persuasion the devil produced from himself. The Lord therefore confuted him out of the law, when He said, "It is written again. Thou shalt not tempt the Lord thy God;" pointing out by the word contained in the law that which is the duty of man, that he should not tempt God; and in regard to Himself, since He appeared in human form, [declaring] that He would not tempt the Lord his God. The pride of reason, therefore, which was in the serpent, was put to nought by the humility found in the man [Christ]; and now twice was the devil conquered from Scripture, when he was detected as advising things contrary to God's commandment, and was shown to be the enemy of God by [the expression of] his thoughts. He then, having been thus signally defeated, and then, as it were, concentrating his forces, drawing up in order all his available power for falsehood, in the third place "showed Him all the kingdoms of the world, and the glory of them," saying, as Luke relates, "All these will I give thee,—for they are delivered to me; and to whom I will, I give them,—if thou wilt fall down and worship me." The Lord then, exposing him in his true character, says, "Depart, Satan; for it is written, Thou shalt worship the Lord thy God, and Him only shalt thou serve." He both revealed him by this name, and showed [at the same time] who He Himself was. For the Hebrew word "Satan" signifies an apostate. And thus, vanquishing him for the third time, He spurned him from Him finally as being conquered out of the law; and there was done away with that infringement of God's commandment which had occurred in Adam, by means of the precept of the law, which the Son of man observed, who did not transgress the commandment of God.
Commentary · Against Heresies, Book V, Chapter 21, Section 2 · Original source · Irenaeus of Lyons; The Writings of Irenaeus, Volume II, Ante-Nicene Christian Library IX; translated by Alexander Roberts and W. H. Rambaut; T. & T. Clark, Edinburgh, 1869. Existing transcription supplied by Wikisource contributors. · Licence · Source revision · Whitespace normalized; source pagination and footnote reference markers removed. English wording unchanged.