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4. When the Lord shall have washed away the filth of the daughters of Zion. He still follows out the same statement; for in consequence of its being generally believed that those calamities by which the Church is diminished inflict upon her grievous injury, the Prophet more zealously inculcates the opposite opinion. And now, for the purpose of refuting that error, he argues, on the contrary, that by this method God washes away the filth, and removes the corruptions, of his Church.

The blood of Jerusalem. By blood I understand not only murders or other atrocious crimes, but defilements and stains of every description. This metaphor is a reduplication, (ἀναδίπλωσις,) by which he repeats the same thing twice; for, having formerly spoken of pollution in general, he now particularly mentions blood as one kind of ceremonial uncleanness. In short, he shows the fruits which spring from God’s chastisements. By them our spots are washed away. When abounding iniquity is not punished, we become corrupted along with others; and therefore it is necessary that God should earnestly warn us, and, like a physician, apply physic, and the lancet, and sometimes proceed to burning

By the spirit of judgment, and by the spirit of burning. Here judgment stands for uprightness from its effect; that is, when they who had deeply fallen are restored to their former condition. He adds, the spirit of burning, by which the filth must be burned and consumed. In this expression there are two things to be observed; first, that the purification of the Church is accomplished by the Spirit; and secondly, that from the effects which he produces the Spirit receives the name, sometimes of judgment and sometimes of burning; as if he had said, The judgment of the Spirit, The burning of the Spirit. Whenever, therefore, expressions of this sort occur in Scripture, “The Lord will do these things by the Spirit of truth, of power, of righteousness,” we may change the expression thus, “by the truth, by the power, by the righteousness, of the Spirit.” In this manner doth the Spirit of God work in us, from whom is both the beginning and the end of our salvation. From these terms, therefore, we ought to learn what are the chief effects which he produces. By his Spirit the Lord purifies our affections that he may renew and sanctify us. The word judgment explains what is of chief importance in the restoration of the Church; that is, when those things which were confused or decayed are restored to good order. Burning points out the plan and method by which the Lord restores the Church to her purity.

5. And Jehovah will create on every dwelling-place of Mount Zion. As if he had said that “there will not be a corner of Mount Zion on which the grace of God does not shine.” Dwelling-place and assembly I understand to mean the same thing; for assembly does not here denote a congregation, but the place where men assemble. With the design to express a full blessing, he alludes to what Moses relates, when the Lord delivered the people from Egyptian bondage, and sent

pillars of cloud by day and pillars of fire by night.
(Exodus 13:21.)

It was customary with the prophets, in describing any remarkable blessing, to remind them of that deliverance from Egypt as an extraordinary work of God; for on that occasion God made a remarkable display of the boundless treasures of his grace in establishing his Church, and left out no proof of his kindness, in order to make known the happiness of that nation. But what chiefly deserved to be commemorated was, that by the covering of a cloud by day he protected them from excessive heat, and that by night a pillar of fire went before them, to prevent them from wandering or going astray.

It amounts to this, that when God shall bring back the Church from the captivity in Babylon, the deliverance will be of a kind not less striking and magnificent than when, at an early period, the nation went out of Egypt. Not that during their journey from Babylon to Judea they would be accompanied, as in the wilderness, by a cloud and a pillar of fire, but that he would display his grace and kindness by other methods not less remarkable. Just as if we were to say at the present day, “God will enlighten us by his Spirit of fire; He will give cloven tongues, (Acts 2:3,) to spread his Gospel throughout the whole world.” Such expressions ought not to be understood literally, as if the Spirit would be sent down from heaven under that visible sign; but by reminding them of the miracle, it would lead believers to expect that the same power of God, which the Apostles formerly experienced, will now be displayed in restoring the Church. Add to this, that the Prophet, by this mode of expression, points out an uninterrupted continuance of blessing; as if he had said, “Not only will God for a moment stretch out his hand for your deliverance, but as he always accompanied your fathers in the wilderness, so likewise he will deliver and protect you to the end.”

For on all the glory shall be a defense. This is connected with what he formerly said, that the bud or branch which should afterwards spring up would be for glory. It is as if he had said, “on all who shall bear the proof and marks of their deliverance.” Perhaps also he alludes to the passage in which it is related that the destroying angel passed over the houses which were marked without doing them any injury, (Exodus 12:23;) for as the sprinkling of blood at that time protected and saved them, so Isaiah promises that believers, when God has marked them, will be safe. This must be carefully observed; for we are reminded that we shall not become partakers of the grace of God in any other way than by bearing his image, and by his glory shining in us.

6. And a covering in the day-time shall be a shadow from the heat. Though the Prophet confirms what we have already noticed, that God will be our perpetual guide till he has brought us to the end of our journey, yet we are reminded that believers will always be exposed to numerous calamities. Scorching heat, and piercing cold, and still heavier distresses, press on them severely; when they escape from one danger, they meet with another. But the highest consolation is that against every inconvenience the shadow of the Lord will of itself be sufficient; for it will cover them in such a manner that nothing can injure or do them any harm. Although, therefore, various calamities and afflictions surround us on every side, still the Lord promises that he will assist us; as it is said in the Psalm,

The sun shall not scorch thee by day, nor the moon by night; for the Lord will preserve thee from all evil. (Psalm 121:6, 7.)

Nothing more is necessary than that we follow our calling, and perform our duty faithfully. It belongs equally to the condition of the good and of the bad that they suffer many inconveniencies; but bad men have no refuge, no place of concealment in which they may hide themselves, and they must be utterly overwhelmed. But blessed is the condition of the godly; for although they endure heat and cold, still they have a safe refuge in God. But that glory of which we formerly spoke must shine in us; otherwise we shall have no share in these things; and if we carry about with us God’s mark, whenever we shall be assailed by a tempest, let us rest assured that he will be our protection.