Matthew Poole and continuators on Isaiah 30:26

26. Moreover, the light of the moon shall be as the light of the sun , and the light of the sun shall be sevenfold, as the light of seven days , in the day that the LORD bindeth up the breach of his people, and healeth the stroke of their wound .

For constancy and brightness: Which, as also the following Clause, is to be understood Metaphorically, of the most glorious and comfortable Condition of God's Church, for surpassing what it was in former Ages. And so this, as well as other passages in this Chapter, concerns the times of the Gospel.

As if the Light of seven days were combined together into one: Its Light shall then be transcendently more bright and glorious, than it hath hitherto been. Which magnificent Expressions seem to be too high for the deliverance of the Iews, either from Sennacherib, or out of Babylon: And do much better agree to the times of the Gospel, in which the Light is far more clear, and the grace of God much more abundant, than ever it was in former times. And this Exposition seems the more probable, because it is the manner of the Prophets; and especially of this, who is rightly called the Evangelical Prophet, to take all occasions to speak of the days of Messiah, and of the blessed Priviledges of that time and state of the Church, among which, they constantly reckon Light, whether you take it for Knowledge or for Comfort, to be one.

When God shall effectually Cure the Wounds and Breaches of his People, first making up the Breach between Him and them, then making Israel and Iudah to be one, who now are sadly divided; and making Iew and Gentile to be one Fold under one Shepherd, even the Messiah, which the Prophets foretell, that it shall be in the times of the Gospel.