as Moses the servant of Yahweh commanded the children of Israel, as it is written in the book of the law of Moses, an altar of uncut stones, on which no man had lifted up any iron: and they offered thereon burnt offerings to Yahweh, and sacrificed peace-offerings.
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).