John Calvin Commentary Deuteronomy 30:8

"And thou shalt return and obey the voice of Jehovah, and do all his commandments which I command thee this day." — Deuteronomy 30:8 (ASV)

And you shall return and obey the voice of the Lord.²⁸⁶ The connecting word that Moses uses here is equivalent to an inferential particle; for he argues from their certainty of obtaining pardon that they should not hesitate to return to God—indeed, that they should rather set about it with a cheerful and ready mind, and then that they should steadfastly continue in the course of obedience. But when he now requires of the people the perseverance that he had just before declared is given by God alone, we may at once infer that they act foolishly who estimate human strength by the commands of God. Meanwhile, let us bear in mind this main point: that true conversion is proved by the consistent tenor of life, because we are redeemed, as Zechariah testifies, for this purpose: that we should serve God, our Deliverer, in holiness and righteousness all the days of our life (Luke 1:74, 75).

²⁸⁶ “Return thou therefore,” etc. — Lat..