Deuteronomy 9:3

MOSES DISSUADES THEM FROM THE OPINION OF THEIR OWN RIGHTEOUSNESS. (Deu. 9:1-25) this day--means this time. The Israelites had reached the confines of the promised land, but were obliged, to their great mortification, to return. But now they certainly were to enter it. No obstacle could prevent their possession; neither the fortified defenses of the towns, nor the resistance of the gigantic inhabitants of whom they had received from the spies so formidable a description. cities great and fenced up to heaven--Oriental cities generally cover a much greater space than those in Europe; for the houses often stand apart with gardens and fields intervening. They are almost all surrounded with walls built of burnt or sun-dried bricks, about forty feet in height. All classes in the East, but especially the nomad tribes, in their ignorance of engineering and artillery, would have abandoned in despair the idea of an assault on a walled town, which to-day would be demolished in a few hours.

Understand therefore this day,.... Or be it known to you for your encouragement, and believe it: that the Lord thy God is he which goeth over before thee as a consuming fire: did not only go before them over the river Jordan, in a pillar of cloud and fire, to guide and direct them, and was a wall of fire around them to protect and defend them, but as a consuming fire, before which there is no standing, to destroy their enemies; see Deu 4:24, he shall destroy them, and he shall bring them down before thy face; be they as great and as mighty, as large and as tall as they may, they will not be able to stand before the Lord, but will soon be made low, and be easily brought down to the earth by him, and to utter destruction; which would be done in a public and visible manner, so as that the hand of the Lord would be seen in it by the Israelites: so shalt thou drive them out, and destroy them quickly, as the Lord hath said unto thee; that is, the far greater part of them, and so many as to make room for the Israelites, and which was quickly done. The Jews commonly say (a), that they were seven years in subduing the land; otherwise they were not to be driven out and destroyed at once, but by little and little: see Deu 7:22. (a) Seder Olam Rabba, c. 11. p. 31, 32.

The design of Moses in this chapter is to convince the people of Israel of their utter unworthiness to receive from God those great favours that were now to be conferred upon them, writing this, as it were, in capital letters at the head of their charter, "Not for your sake, be it known unto you," Eze 36:32. I. He assures them of victory over their enemies (Deu 9:1-3). II. He cautions them not to attribute their successes to their own merit, but to God's justice, which was engaged against their enemies, and his faithfulness, which was engaged to their fathers (Deu 9:4-6). III. To make it evident that they had no reason to boast of their own righteousness, he mentions their faults, shows Israel their transgressions, and the house of Jacob their sins. In general, they had been all along a provoking people (v. 7-24). In particular, 1. In the matter of the golden calf, the story of which he largely relates (Deu 9:8-21). 2. He mentions some other instances of their rebellion (Deu 9:22, Deu 9:23). And, 3. Returns, at Deu 9:25, to speak of the intercession he had made for them at Horeb, to prevent their being ruined for the golden calf.

9:3 The graphic metaphor like a devouring fire depicts God’s war against his enemies (see 1:30). God will not just use fire but will himself be a raging inferno, consuming everything in his path. In the end, Israel would simply have to step in and occupy the subdued land.