Thou shall not be affrighted at them,.... At their numbers, nor at their gigantic stature:

for the Lord thy God is among you: in the tabernacle, in the holy of holies, which was in the midst of them, and besides would give proof of his powerful presence among them, in protecting them, and destroying their enemies:

a mighty God and terrible; mighty to save his people, and terrible to others.

Israel had no need to be afraid of them, as Jehovah was in the midst of it a mighty God and terrible. He would drive out the nations, but only gradually, as He had already declared to Moses in Exodus 23:30-31, and would smite them with great confusion, till they were destroyed, as was the case for example at Gibeon (Joshua 10:10; cf. Exodus 23:27, where the form המם is used instead of הוּם), and would also deliver their kings into the hand of Israel, so that their names should vanish under the heaven (cf. Deuteronomy 9:14; Deuteronomy 25:19; and for the fulfilment, Joshua 10:22., Deuteronomy 11:12; Deuteronomy 12:7-24). No one would be able to stand before Israel.

Thou shalt not be affrighted at them: for the LORD thy God is among you, a mighty God and terrible.

7:12-26 We are in danger of having fellowship with the works of darkness if we take pleasure in fellowship with those who do such works. Whatever brings us into a snare, brings us under a curse. Let us be constant to our duty, and we cannot question the constancy of God's mercy. Diseases are God's servants; they go where he sends them, and do what he bids them. It is therefore good for the health of our bodies, thoroughly to mortify the sin of our souls; which is our rule of duty. Yet sin is never totally destroyed in this world; and it actually prevails in us much more than it would do, if we were watchful and diligent. In all this the Lord acts according to the counsel of his own will; but that counsel being hid from us, forms no excuse for our sloth and negligence, of which it is in no degree the cause. We must not think, that because the deliverance of the church, and the destruction of the enemies of the soul, are not done immediately, therefore they will never be done. God will do his own work in his own method and time; and we may be sure that they are always the best. Thus corruption is driven out of the hearts of believers by little and little. The work of sanctification is carried on gradually; but at length there will be a complete victory. Pride, security, and other sins that are common effects of prosperity, are enemies more dangerous than beasts of the field, and more apt to increase upon us.