(30) The Lord thy God hardened his spirit, and made his heart obstinate.--Jehovah gave the strength to Sihon, as He had done to Pharaoh, and as He does to all. Sihon was responsible for using the strength which God gave him in opposition to the Divine purposes. To "harden" a man's spirit is not necessarily a moral process any more than the hardening of steel. "Made obstinate" is the same verb used in Joshua 1:6, for "Be of a good courage." An unyielding spirit and a courageous heart are good or bad according to the use made of them. Sihon used them badly, Joshua used them well. God's gifts were the same to both. (See also Joshua 11:20.)

Verse 30. - Heshbon, the chief city of the Amorite king, Sihon. Some ruins on a hill east of the upper end of the Dead Sea, and bearing the name Chesban, mark the site of this once large and important city. Sihon rejected Moses' overtures of peace, because God had hardened his spirit, and made his heart obstinate; literally, had sharpened his heart, had made his determination keen. It is not to be supposed that any influence was directly exerted on him, to make him obdurate and persistent in his hostility to the people of God; the expression "he would not" indicates that it was of his own will that Sihon acted; but it was the will and purpose of God that Sihon should be destroyed, and his country taken by the Israelites, and so he was placed in circumstances by which, "given over to a reprobate mind," he was confirmed and strengthened m his determination to pursue a course which led to his destruction; like Pharaoh, by the circumstances in which God placed him, he found scope for the display and for the confirmation of a stubborn, pertinacious pride of spirit, which led ultimately to his ruin. Nothing so hardens the heart as resistance to God's overtures of peace. As appeareth this day; i.e. as present experience shows; in Sihon's refusing to let them pass, there was already an actual beginning of the fulfillment of God's purpose to deliver him into the hand of the Israelites.

2:24-37 God tried his people, by forbidding them to meddle with the rich countries of Moab and Ammon. He gives them possession of the country of the Amorites. If we keep from what God forbids, we shall not lose by our obedience. The earth is the Lord's and the fulness thereof; and he gives it to whom he pleases; but when there is no express direction, none can plead his grant for such proceedings. Though God assured the Israelites that the land should be their own, yet they must contend with the enemy. What God gives we must endeavour to get. What a new world did Israel now come into! Much more joyful will the change be, which holy souls will experience, when they remove out of the wilderness of this world to the better country, that is, the heavenly, to the city that has foundations. Let us, by reflecting upon God's dealings with his people Israel, be led to meditate upon our years spent in vanity, through our transgressions. But happy are those whom Jesus has delivered from the wrath to come. To whom he hath given the earnest of his Spirit in their hearts. Their inheritance cannot be affected by revolutions of kingdoms, or changes in earthly possessions.But Sihon king of Heshbon would not let us pass by him,.... Or through his country, as was desired:

for the Lord had hardened his spirit, and made his heart obstinate; as he did Pharaoh's, for whom he will he hardens; so that he would not listen to the proposals made to him, nor grant the requests asked of him, but with pride and haughtiness of spirit despised and disdained Israel:

that he might deliver him into thine hand; that so an opportunity might offer of fighting with him, and taking his country from him; whereas, had he been peaceable and flexible, he had continued in the enjoyment of his land, and Israel would not have had that advantage against him; but God, who has the hearts of kings and of all men in his hands, so wrought upon him that he should take the steps he did, which made way for the delivery of him and his country into the hands of the Israelites:

as appeareth this day: for when Moses made this speech, the kingdom of Sihon was possessed by the Israelites, Numbers 21:24.