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 De 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 , 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 De 7:22. Seder Olam Rabba, c. 11.
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