Christ’s justifying penal substitutionary death is the price paid “once for all” (Heb. 9:12; see 9:26–28), and the good works done within the context of Christian faith become the inevitable evidence of such faith at the final judicial evaluation, when the believer is openly acknowledged and acquitted before all. Christ’s work (both His death and His perfect obedience) is the “necessary causal condition” for justification, and the believer’s works are a “necessary (but not ultimately causal) condition’” for “acquittal” before other men.
The Bible features multiple references to the final judgment. Matthew 25 is probably the longest such passage in all of Scripture. In verses 31–46, Christ “separates the sheep from the goats,” with the former rewarded with a kingdom inheritance and the latter told to “depart . . . into the eternal fire.” Other extended discussions of the end-time judgment include Luke 19:12–27; Romans 2:5–16; Hebrews 10:26–30; 2 Peter 3:7–14; and Jude 6, 14–15, 24.