And the light of Israel shall be for a {l} fire, and his Holy One for a flame: and it shall burn and devour {m} his thorns and his briers in one day;

(l) Meaning that God is a light to comfort his people and a fire to burn his enemies.

(m) That is, the Assyrians.

Wesley's Notes

10:17 The light - That God who is and will be a comfortable light to his people. A fire - To the Assyrians. Thorns - His vast army, which is no more able to resist God, than dry thorns and briars are to oppose the fire.

Jamieson-Fausset-Brown Bible Commentary

17, 18. light of Israel-carrying out the image in the end of Isa 10:16. Jehovah, who is a light to Israel, shall be the "fire" (De 4:24; Heb 12:29) that shall ignite the "thorns," (the Assyrians, like dry fuel, a ready prey to flame).

Matthew Henry's Concise Commentary

10:5-19 See what a change sin made. The king of Assyria, in his pride, thought to act by his own will. The tyrants of the world are tools of Providence. God designs to correct his people for their hypocrisy, and bring them nearer to him; but is that Sennacherib's design? No; he designs to gratify his own covetousness and ambition. The Assyrian boasts what great things he has done to other nations, by his own policy and power. He knows not that it is God who makes him what he is, and puts the staff into his hand. He had done all this with ease; none moved the wing, or cried as birds do when their nests are rifled. Because he conquered Samaria, he thinks Jerusalem would fall of course. It was lamentable that Jerusalem should have set up graven images, and we cannot wonder that she was excelled in them by the heathen. But is it not equally foolish for Christians to emulate the people of the world in vanities, instead of keeping to things which are their special honour? For a tool to boast, or to strive against him that formed it, would not be more out of the way, than for Sennacherib to vaunt himself against Jehovah. When God brings his people into trouble, it is to bring sin to their remembrance, and humble them, and to awaken them to a sense of their duty; this must be the fruit, even the taking away of sin. When these points are gained by the affliction, it shall be removed in mercy. This attempt upon Zion and Jerusalem should come to nothing. God will be as a fire to consume the workers of iniquity, both soul and body. The desolation should be as when a standard-bearer fainteth, and those who follow are put to confusion. Who is able to stand before this great and holy Lord God?