[59] Riehm, _Old Testament Theology_, p. 98.
To press home this, to induce Israel to respond to this demand, to convince them anew of their obligation to go any length to keep their position as a people holy to Yahweh, our chapter urges a variety of reasons. The first (vv. 7-11) is that the history and grounds of their election exhibit the character of Yahweh in such a way as to heighten their sense of their privileges and the danger of losing them. He had chosen them, only because of His own love to them; and having chosen them and sworn to their fathers, He is true to His covenant. He brought them out of the house of bondage, and has led them until now. In Yahweh they had a spiritual ideal, whose characteristics were love and faithfulness. But though He loves He can be wrathful, and though He has made a covenant with Israel, it must be fulfilled in accordance with righteousness. In dealing with such a God they must beware of thinking that their election is irrespective of moral conditions, or that His love is mere good nature. He can and does smite the enemies of good, for anger is always possible where love is. It is only with good nature that anger is not compatible, just as warm and self-sacrificing affection also is. Those who turn away from Him, therefore, He requites immediately to their face, as surely as "He keepeth covenant and mercy with them that love Him and keep His commandments." All the blessed and intimate relations which He has opened up with them, and in which their safety and their glory lie, can be dissolved by sin. They are, therefore, to strike fiercely at temptation, to regard neither their own lives nor the lives of others when that has to be put out of the way, to smite and spare not, for the very love of God.
A second reason why they should obey the Divine commands, as in other matters, so in this terrible thing, is this. If they be willing and obedient, then God will bless them in temporal ways as well as with spiritual blessings. Even for their earthly prosperity a loyal attitude to Yahweh would prove decisive. "Thou shalt be blessed above all peoples; there shall not be a male or female barren among you, or among your cattle. And Yahweh will take away from thee all sickness, and He will put none of the evil diseases of Egypt which thou knowest upon thee; but will lay them upon all them that hate thee." The same promises are renewed in more detail and with greater emphasis in the speech contained in chapters xxviii. and xxix. There the significance of such a view, and the difficulties involved in it for us, will be fully discussed. Here it will be sufficient to note that the profit of obedience is brought in to induce Israel to enforce the "ban" most rigorously.
The last verses of our chapter, vv. 17-26, set before Israel a third incitement and encouragement. Yahweh, who had proved His might and His favour for them by His mighty deeds in Egypt, would be among them, to make them stronger than their mightiest foes (ver. 21): "Thou shalt not be affrighted at them, for Yahweh thy God is in the midst of thee, a great God and a terrible." The previous inducements to obey Yahweh their God and be true to Him were founded on His character and on His acts. He was merciful; but He could be terrible, and He would reward the faithful with prosperity. Now His people are encouraged to go forward because His presence will go with them. In the conflicts which obedience to Him would provoke, He would be with them to sustain them, whatever stress might come upon them. Step by step they would drive out those very peoples whom they had dreaded so when the spies brought back their report of the land. The terror of their God would fall upon all these nations. A great God and a terrible He would prove Himself to be, and with Him in their midst they might go forth boldly to execute the ban upon the Canaanites. The sins and vices of these peoples had brought this upon them; their horrible worship left an indelible stain wherever its shadow fell. Israel, led and directed by Yahweh Himself, was to fall upon them as the scourge of God.