Claim. Because the cross secured only spiritual salvation and left original-sin active in the flesh and lineage, Jesus must return to earth to uproot original sin physically and complete the providence — the Second Advent is structurally required by the limit of cross-salvation, not an optional eschatological bonus.
Elaboration. Per 1.4. The Limit of Salvation through Redemption by the Cross and the Purpose of Jesus’ Second Advent: “to uproot the original sin, which he could not remove through the crucifixion, and to complete the work of physical salvation, Jesus must come again on earth.” Per §1.2: Jesus, “knowing that the redemption by the cross would not completely fulfill the purpose for which he came, promised he would come again.” God’s Will to restore the Kingdom on earth is “absolute and unchangeable.”
This atomic supplies DP’s positive justification for the Second Advent as theological necessity rather than apocalyptic flourish. The argument: God’s purpose of creation (Kingdom of Heaven on earth) was not fulfilled by Jesus’s first coming because the physical line was cut short; the Will is absolute; therefore the Messiah must return to complete physical restoration.
Connects forward to DP’s true-parents doctrine — the Second Advent is conceived not as a return-in-glory of the same Jesus, but as a new advent of the messianic mission that includes physical-conjugal completion (developed in Part 2). Connects to Pentecost as removal of the flaming sword and to the broader Jesus-as-Last-Adam framework.
See also. dp-cross-grants-spiritual-salvation-only-not-physical, dp-last-days-recurring-transition-not-single-event