(Verse 3, 4 and following) And the Lord said to Isaiah: Go out to meet Ahaz, you and your son Shear-Jashub, at the end of the conduit of the upper pool on the highway to the Fuller's Field. And say to him: Take heed, be quiet, do not fear, and do not let your heart be faint because of these two smoldering stumps of firebrands, at the fierce anger of Rezin and Syria, and the son of Remaliah. Because Syria, Ephraim, and the son of Remaliah have plotted evil against you, saying: Let us go up against Judah and trouble it, and let us make a gap in its wall for ourselves, and set a king over it, the son of Tabeel. Thus says the Lord God, this will not stand, and this will not be, but the head of Syria is Damascus and the head of Damascus is Rezin, and yet sixty-five years, and Ephraim will cease to be a people. And the head of Ephraim is Samaria, and the head of Samaria is the son of Romelia. If you do not believe, you will not endure. Jasub, the son of Isaiah, who is interpreted as the remnant and turning back, in the likeness of the people of Judah, who was to be saved from the hands of the two kings, is commanded to go out with his parent and meet Ahaz, the king of Judah, by the upper pool of the aqueduct, on the road of the fuller's field, where later we will read, in the time of King Hezekiah, Rabshakeh stood to blaspheme the people of God by order of Sennacherib, the king of Assyria. The place they went out to was the one where the leaders of the city, sent by Hezekiah, were mentioned in the book of Kings. And it is commanded to Ahaz (2 Kings 18), even though he is a wicked king, by the mercy of the Lord, to be silent and not be terrified or afraid in his heart, thinking that he will suffer similar things that he had suffered before. However, he calls the two tails of burning wood, that is, the smoke towers, Rezin the king of Syria and Pekah the son of Remaliah king of Samaria, because the kingdom of Syria, that is, Damascus, and the kingdom of Samaria, that is, the ten tribes, which were called Ephraim by another name, end in them. For it is written (2 Kings 16) that Theglathphalassar, king of the Assyrians, ascended to Damascus under King Ahaz and laid it waste, and carried away its inhabitants to Cyrene, and killed Rasin, and that he plotted against Pekah son of Remaliah, and killed him, and reigned in Israel for nine years in his place, and that Salmanasar, king of Assyria, came and besieged Samaria, which is now called Sebaste, for three years, and in the ninth year of the reign of Hoshea he captured it, and he imprisoned Hoshea and carried Israel away to the Assyrians, and placed them in Halah and in Habor by the River Gozan and in the cities of Media, or as the Septuagint translated, in the mountains of Media (2 Kings 17). For although the wicked kings have devised a plan today to ascend to Judah, whose region is situated in the mountains, and to rouse him from his rest, and in a way, to subdue him to their authority; and to set over him the son of Tabeel, who is interpreted as 'good God', in order to show either a man with this name, or an idol. Nevertheless, thus says the Lord God: This plan shall not stand, but for the time being the head of Syria's cities shall be Damascus, and in that very metropolis, Rasin shall reign. Furthermore, in Ephraim because of Jeroboam the son of Nabath, who was the first ruler of Ephraim, there will be the head of Samaria, that is, the royal house in the city of Samaria, and the head of Samaria will be the son of Romelia, that is, Phacee: however, the kingdom of the ten tribes, that is, the people of Ephraim, will cease to exist after sixty-five years. If we do not pay closer attention, it will not be able to stand. For in the twelfth year of Achaz the son of Joatham in the tribe of Judah, Hoshia ruled over Samaria, and in the ninth year, he was captured by the Assyrian empire (2 Kings 17). However, Achaz reigned over Judah for sixteen years (2 Kings 16), after whose death in the seventh year of his reign, Hoshea was captured and Samaria was destroyed, and the entire people were transported to Media. Thus, if we were to add sixteen years for Achaz and seven for Hoshea, there would be a total of twenty-three years, or at most, twenty-four. So where are the sixty-five years in which the kingdom of Israel is said to be ended? Therefore, the Hebrews explained this passage as follows: Amos, who began prophesying during the reign of Uzziah, also known as Azariah, and Isaiah, who began his prophecy, was the first to prophesy against Israel, saying: But Israel shall be taken captive out of his own land (Amos 7:11, 17). The title of his prophecy against Samaria is: And he began to prophesy in the days of Uzziah, king of Judah, two years before the earthquake, which is said to have occurred at the time when Uzziah entered the temple of God and usurped the priesthood for himself, and the earth shook, and the ashes of the altar were poured out, and the king himself was struck with leprosy (II Chronicles 26). But Ozias wanted there to be twenty-five years when these things happened, of which there remain twenty-seven more years. For Ozias reigned for fifty-two years (2 Kings 15), after him his son Joatham reigned for sixteen years, and his son Achaz for another sixteen years. After him reigned Ezechias, and in the sixth year of his reign, Samaria was captured, making a total of sixty-five years (2 Kings 16). This, the Lord predicting through the prophet, Achaz and the people did not believe the future. Hence it is added: If you do not believe, you will not remain, as Symmachus translated, that is, you will not remain in your kingdom, but you will be led into captivity, enduring the punishment of those whose faithlessness you imitated. Or certainly according to the Septuagint, you will not understand. And the meaning is: because you do not believe what the Lord says will happen, you will not have understanding. These things we have spoken according to history. However, according to the intended symbolism, it should be considered that the prophet Isaiah is commanded to meet the impious king, going out from his place, not at the beginning of the aqueduct, but at the farthest ends of the upper pool, which was in the field of the clothiers, where impurities and stains were cleansed. Although Ahaz reigned over Judah, because he was impious, he dwelled at the farthest ends of the upper pool. Therefore, God does not have such pity on a king whom he regarded as unworthy of salvation as he has for his own people. However, the two tails of smoking torches, as we have previously mentioned, are called secular wisdom and heretical discourse, the end of which is destruction. Those who foolishly devised a plan to rise up against Judah, in order to capture him as if he were careless and asleep, and to associate him with their own errors, and to place the son of Tabeel, that is, a false god, on him. For both adversaries consider the truth to be with themselves, and they estimate that their own doctrine is the best. In the end, the heretic Marcion believes that Christ is the son of the good God, that is, of another, and not of the just one whose prophets he is. He calls him bloody, cruel, and a judge. While they are saying these things, the Lord threatens that their plan will not stand, but for the time being, as long as this world stands, and as long as the things of this world rule in their boundaries and cities. But when the time of the consummation comes, that is, sixty-five years, and both the things of the world that were made in six days, and all that pertains to the five senses, come to an end, then everything will be dissolved, which the gentiles and heretics do not believe will happen, and because of their disbelief, they do not understand what is being said.
It is essential to notice that the statement means that those who read it do not only need understanding but also faith; and not only faith but also understanding. Those of the circumcision who do not believe in the Christ of God, though even now they hear these words, do not have understanding of the subject of this prophecy because they do not hear with the mind. The only reason for their lack of understanding is their lack of faith, as the prophecy clearly reveals both about them and to them.
Certainly one must have faith in the Scriptures as containing the divine mind, and thus one must proceed to the understanding of what is written in them. For one must go beyond the types and thus apprehend the truth of what has been shown to us. First one must believe in the Scriptures with the simple faith that they are “inspired by God and useful” and then go on to examine subtly and enquiringly the meaning contained in them.
That the way to understand, therefore, may be open to you, you do rightly first of all, in professing that you believe; for no one embarks upon the sea and trusts himself to the deep and liquid element unless he first believes it possible that he will have a safe voyage. Neither does the husbandman commit his seed to the furrows and scatter his grain on the earth, but in the belief that the showers will come, together with the sun’s warmth, through whose fostering influence, aided by favoring winds, the earth will produce and multiply and ripen its fruits. Nothing in life can be transacted if there be not first a readiness to believe. What wonder then, if, coming to God, we first of all profess that we believe, seeing that, without this, not even common life can be lived.
“And Ahaz said, ‘I will not ask and I will not tempt the Lord.’ ” It is not from humility but from pride that he does not wish to ask for a sign from the Lord. For although it is written in Deuteronomy, “You shall not tempt the Lord your God,” and the Savior would use this as testimony against the devil, when Ahaz was told to ask for a sign he should have fulfilled the commandment in obedience, especially since both Gideon and Manoah sought and received signs. Although it was according to the ambiguity of the Hebrew expression ulo enasse adonai that everyone translated this as “I will not tempt the Lord,” it can also be read as “I will not exalt the Lord.” For the impious king knew that if he had asked for a sign, he would have received one, and the Lord would have been glorified. Like a worshiper of idols, therefore, who sets up altars on all the street corners and on mountains and in forests, he also was a fanatic for capriciousness. He did not want to ask for a sign because he was commanded to do so.
“Unless you believe, you shall not understand,” showing that as righteousness is by faith, understanding comes by wisdom. Accordingly, in the case of those who eagerly demand evident truth, we must not condemn the desire but regulate it, so that beginning with faith it may proceed to the desired end through good works.
If you are not able to understand, believe, that you may understand. Faith goes before; understanding follows after; since the prophet says, “Unless you believe, you shall not understand.
The mysteries and secrets of the kingdom of God first seek for believing people, that they may make them understanding. For faith is understanding’s step, and understanding faith’s attainment. This the prophet expressly says to all who prematurely and in undue order look for understanding and neglect faith.
So, then, in some points that bear on the doctrine of salvation, which we are not yet able to grasp by reason—but we shall be able to sometime—let faith precede reason, and let the heart be cleansed by faith so as to receive and bear the great light of reason; this is indeed reasonable. Therefore the prophet said with reason: “If you will not believe, you will not understand”; thereby he undoubtedly made a distinction between these two things and advised us to believe first so as to be able to understand whatever we believe. It is, then, a reasonable requirement that faith precede reason, for, if this requirement is not reasonable, then it is contrary to reason, which God forbid. But, if it is reasonable that faith precede a certain great reason that cannot yet be grasped, there is no doubt that, however slight the reason which proves this, it does precede faith.
[AD 420] Jerome on Isaiah 7:3-9