While Scripture has much to say about individual households, it tells us also that ultimately there is only one eternal household, the household of God, which is the church (1 Peter 4:17). In the consummation of all things, the only household that will continue is the household consisting of the redeemed people of God from every generation, dwelling together forever as children of God in the new heaven and new earth.
This household was established in the garden of Eden with Adam serving as our family head under the covenant of works (Gen. 2:16–17). He failed to offer the necessary obedience to lead us into eschatological life, instead bringing us all into an estate of sin and misery in his first transgression. Nevertheless, God was pleased to establish a second covenant, the covenant of grace (3:15). He further revealed His plans for His covenant people by establishing a covenant with Abraham, an administration of this covenant of grace, promising him, “In you all the families of the earth shall be blessed” (12:3). This is the same covenant household God established in the beginning, and it will endure through all eternity.
In God’s wisdom, this eschatological household is a diverse body, comprising members from every nation, tribe, people, and language (Rev. 7:9). Christ has destroyed every ethnic and sociological distinction the world establishes to erect barriers among people. In the ancient church, the most significant barrier was between Jews and gentiles. Christ has torn down even that dividing wall, creating one new man in Him (Eph. 2:14–15). Everyone who believes in Christ for salvation will be saved and brought into this household. These have the same faith as their spiritual father, Abraham (Rom. 4:12; Gal. 3:29).