Deuteronomy 30:8

Israel would then hearken again to the voice of the Lord and keep His commandments, and would rejoice in consequence in the richest blessing of its God. In the expression, ושׁמעתּ תשׁוּב אתּה ("thou shalt return and hearken"), תּשׁוּב ("thou shalt return") has an adverbial signification. This is evident from the corresponding expression in Deu 30:9, "for Jehovah will again rejoice over thee" (lit., "will return and rejoice"), in which the adverbial signification is placed beyond all doubt. Deu 30:8-10 contain the general thought, that Israel would then come again into its normal relation to its God, would enter into true and perfect covenant fellowship with the Lord, and enjoy all the blessings of the covenant. Deu 30:9 Deu 30:9 is a repetition of Deu 28:11. The Lord will rejoice again over Israel, to do them good (vid., Deu 28:63), as He had rejoiced over their fathers. The fathers are not the patriarchs alone, but all the pious ancestors of the people. Deu 30:10 A renewed enforcement of the indispensable condition of salvation.

One would have thought that the threatenings in the close of the foregoing chapter had made a full end of the people of Israel, and had left their case for ever desperate; but in this chapter we have a plain intimation of the mercy God had in store for them in the latter days, so that mercy at length rejoices against judgment, and has the last word. Here we have, I. Exceedingly great and precious promises made to them, upon their repentance and return to God (Deu 30:1-10). II. The righteousness of faith set before them in the plainness and easiness of the commandment that was now given them (Deu 30:11-14). III. A fair reference of the whole matter to their choice (Deu 30:15, etc.).