I make a covenant. God’s willingness to renew His covenant with Israel evinces two facts: (1) His faithfulness toward His people, because of His promises to their fathers, and (2) the conquering power of intercessory prayer. Additional pledges not mentioned previously are given, such as the performance of miracles, the enlargement of their borders, and security against invasion (v. 24). The blessings of cooperation with God are infinitely beyond finite comprehension (Eph. 3:20).
Do marvels. These were to include the drying up of the Jordan River (Joshua 3:14—17), the fall of Jericho (Joshua 6:15-21), and the slaughter of their enemies by hailstones (Joshua 10:1-11).
A terrible thing. Not to be done to Israel but to their enemies (Deut. 10:21; Ps. 106:22; 145:6).