Claim. The cross secured spiritual salvation for believers through Jesus’s victorious resurrection, but it did not eliminate original-sin from the flesh — lineal transmission of original sin continues, even in the most devout Christian families, because Jesus’s body was struck down by Satan before physical redemption could be accomplished.
Elaboration. Per 1.4. The Limit of Salvation through Redemption by the Cross and the Purpose of Jesus’ Second Advent: humans were created in both spirit and flesh (“the Lord God formed man of dust from the ground, and breathed into his nostrils the breath of life”), so the fall happened both spiritually and physically. Full salvation therefore required physical redemption — which depended on the people uniting with Jesus’s body (per Jesus as Last Adam). When the people instead led him to the cross, “Jesus’s body was exposed to Satan’s assault, and he was killed.” Even faithful Christians’ bodies remain “exposed to Satan’s attack, just as was Jesus’s body.”
This is the load-bearing payoff for the Ch 2 lineage-transmission of original sin: even devout Christian parents transmit original sin to their children. Paul’s lament — “I see in my members another law at war with the law of my mind… wretched man that I am!” (Rom 7:22-25) — is read as the testimony of someone with spiritual salvation but no physical salvation. John concurs: “if we say we have no sin, we deceive ourselves” (8).
This atomic frames why the Second Advent is required: to uproot what the cross could not remove.
See also. dp-pentecost-as-flaming-sword-removal-by-holy-spirit, dp-cross-was-not-gods-primary-plan