17 You're going to think to yourselves, "Oh! We're outnumbered ten to one by these nations! We'll never even make a dent in them!" 18 But I'm telling you, Don't be afraid. Remember, yes, remember in detail what God, your God, did to Pharaoh and all Egypt. 19 Remember the great contests to which you were eyewitnesses: the miracle-signs, the wonders, God's mighty hand as he stretched out his arm and took you out of there. God, your God, is going to do the same thing to these people you're now so afraid of.
Matthew Henry's Commentary on Deuteronomy 7:17-19
Commentary on Deuteronomy 7:12-26
(Read Deuteronomy 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.