"You have now become the people of the LORD your God." (Deuteronomy 27:9)
Moses and the elders command Israel: when you cross the Jordan into the land, set up large stones and coat them with plaster. Write on them all the words of this law after you have crossed over. Build an altar to the LORD of unhewn stones at Mount Ebal and offer burnt offerings and fellowship offerings and rejoice before the LORD. Moses and the Levitical priests speak to all Israel: be silent, Israel, and listen. You have now become the people of the LORD your God. Obey the LORD your God and follow his commands and decrees that I give you today.
Then Moses commands the ceremony of blessing and curse at the two mountains. Six tribes are to stand on Mount Gerizim to bless the people and six on Mount Ebal to pronounce curses. The Levites then recite twelve curses in a responsive liturgy, and all the people say Amen after each one: cursed is anyone who makes an idol, who dishonours their father or mother, who moves their neighbour's boundary stone, who leads the blind astray, who withholds justice from the foreigner or fatherless or widow, who commits various sexual sins, who kills the innocent, who accepts a bribe. Each curse is the negative of a covenant obligation; each Amen is the community's acceptance of the consequence of violation. The Catechism identifies this liturgy as the model for moral confession in the covenant community: the public naming of what violates the covenant (CCC 1963).
Brothers and sisters, you have now become the people of the LORD your God. The declaration of identity precedes the list of obligations. You are his people before you are given his commands. The commands flow from the relationship, not the relationship from the commands. Receive your identity first, then live from it.
Lord God, we have become your people. Let that identity be the foundation of every obedience and the ground of every blessing. We say Amen to your curses because we take your covenant seriously enough to name what violates it. Through Christ our Lord. Amen.