Union with Christ — Dying and Rising in Romans 6

Sanctification flows from union with Christ. Rom 6:1-11 argues that those baptized into Christ were baptized into his death, so that "we too might walk in newness of life." Sin's dominion is broken because the believer has died and risen with Christ.

John Calvin — Institutes of the Christian Religion, holding justification and sanctification to be distinct but inseparable gifts received in the one Christ. The same union grounds Catholic Church — Catechism of the Catholic Church and the Eastern vision of Athanasius — On the Incarnation. John Owen — The Death of Death in the Death of Christ.

The baptismal logic of 6:3-4 connects to the Great Commission of Matt 28:19 and to the new-creation theme of Rom 8:1-4, where there is now "no condemnation." Sanctification is the outworking of a gift already given.