The injunction to write the Law on the stones is repeated, with the addition that it was to be done very plainly (LXX; σαφῶς σφόδρα: Vulgate, plane et lucide), which shows that the main purpose of setting up the stones was that the Law might be easily known by the people (cf. Habakkuk 2:2). The stones and the altar were fittingly placed on Ebal, the mount of cursing. For the setting up of the stones on which the Law was inscribed, and the building beside them of the altar, was the symbolical renewal of the covenant of God with Israel, and the establishment in Canaan of that dispensation which was "the ministration of condemnation and of death" (2 Corinthians 3:7, 2 Corinthians 3:9), and of that Law which, though in itself "holy, just, and good," can only, because of man's perversity and sinfulness, bring on those who are under it a curse (Galatians 3:10).
When Israel renewed the covenant with the Lord, by solemnly setting up the Law in Canaan, it became thereby the nation of God, and bound itself at the same time to hearken to the voice of the Lord, and keep his commandments, as it had already done (cf. Deuteronomy 26:17, Deuteronomy 26:18; Micah 4:5).