All Israel, and their elders and officers, and their judges, stood on this side of the ark and on that side before the priests the Levites, who bore the ark of the covenant of Yahweh, as well the foreigner as the native; half of them in front of Mount Gerizim, and half of them in front of Mount Ebal; as Moses the servant of Yahweh had commanded at the first, that they should bless the people of Israel.
It is important for God’s people to declare their allegiance to His revealed will publicly among the unbelievers with whom we live (cf. Acts 1:8). This helps them understand why we live as we do, and it brings glory to God when His people then proceed to live upright lives and demonstrate His supernatural power (cf. Matthew 5:16).