4 You shall walk after Yahweh your God, and fear him, and keep his commandments, and obey his voice, and you shall serve him, and cling to him.
*Minor differences ignored. Grouped by changes, with first version listed as example.
Ye shall walk after the Lord your God,.... As he has directed, according to the laws and rules which he has given, both with respect to their moral and civil conduct, and their religious worship of him; and so the Targum of Jonathan,"ye shall walk after the worship of the Lord your God:"
and fear him, and keep his commandments; fear to offend him, and so keep his commandments; or keep his commandments from or through fear; not a servile but a filial one, a reverential affection for him; this is the whole duty of man, Ecclesiastes 12:13,
and obey his voice; in his word, or by his prophets and ministers: it may very well be understood of the voice of Christ, the Angel that went before them, whose voice they were continually to hearken to and obey, Exodus 23:21.
and you shall serve him, and cleave unto him; it may respect all religious worship, both private and public; the Targum of Jonathan restrains it to prayer, but it not only includes that, but all other acts of piety and devotion, and which are to be constantly performed and not departed from; for so to do is to cleave to the Lord as a man to his wife, or a woman to her husband, in which conjugal relation God and his people Israel were, he was an husband unto them, and to do otherwise is to go a whoring from him after other gods.
God permitted false prophets to rise up with such wonders, to try the Israelites, whether they loved Him, the Lord their God, with all their heart. (נסּה as in Genesis 22:1.) אהבים הישׁכם, whether ye are loving, i.e., faithfully maintain your love to the Lord. It is evident from this, "that however great the importance attached to signs and wonders, they were not to be regarded among the Israelites, either as the highest test, or as absolutely decisive, but that there was a certainty in Israel, which was so much the more certain and firm than any proof from miracles could be, that it might be most decidedly opposed to it" (Baumgarten). This certainty, however, was not "the knowledge of Jehovah," as B. supposes; but as Luther correctly observes, "the word of God, which had already been received, and confirmed by its own signs," and which the Israelites were to preserve and hold fast, without adding or subtracting anything. "In opposition to such a word, no prophets were to be received, although they rained signs and wonders; not even an angel from heaven, as Paul says in Galatians 1:8." The command to hearken to the prophets whom the Lord would send at a future time (Deuteronomy 18:18.), is not at variance with this: for even their announcements were to be judged according to the standard of the fixed word of God that had been already given; and so far as they proclaimed anything new, the fact that what they announced did not occur was to be the criterion that they had not spoken in the name of the Lord, but in that of other gods (Deuteronomy 18:21-22), so that even there the signs and wonders of the prophets are not made the criteria of their divine mission.
*More commentary available at chapter level.