V.1-6 Something new to learn — the land to which they were going was a land where the people were much more mighty than Israel. How then would they be able to overcome them? By God only. What did it matter how strong the enemy was! (Rom. 8:31).
V.4-6 Remember the difference between the promises made to Abraham (Gen. 15:18) and of the agreement God made with Israel (Ex. 19:5-8). The first was unconditional, the second on condition that Israel obeyed. So these verses are to remind them that they are not getting the land because of the second, but because of the first!
V.7-29 Once again God takes more verses to warn.
V.24 Just about tells their whole history. God must remind them of how bad they were. Unless we see how bad we are by nature, we never realize that through Christ alone we live. There is power in our life when we learn this.
V.25-29 What a wonderful prayer of Moses! He had prayed for 40 days to God not to destroy them at the beginning of their journey. Now he has to pray for them again. Notice he recalls God’s first unconditional promise to Abraham! It is important to read this chapter carefully.