Scripture teaches that God has appointed a day in which He will judge the world in righteousness through Jesus Christ, at which time all persons will appear before Him to account for their lives. The result of this final judgment is the fixed and eternal separation of the righteous unto everlasting life and the wicked unto everlasting punishment.
The final judgment is a central tenet of the Reformed faith, as established in the 1689 LBCF Ch.32 §1. It is not a day for human deliberation, but a day where the living and the dead shall appear before the tribunal of Christ, to whom all authority has been delegated by the Father. As the Apostle Paul declared, God has fixed this appointment to call all men to repentance, giving assurance of this reality by raising Christ from the dead Acts 17:31.
The judgment is characterized by a righteous separation, often illustrated as a shepherd dividing sheep from goats. Christ will manifest His glory, and the eternal state of every soul will be fixed based on their relationship to Him Matthew 25:31-33. The outcome is binary and eternal, as Scripture warns that the wicked shall go away into eternal punishment, but the righteous into eternal life Matthew 25:46. This is a terrifying prospect for the ungodly, but for the believer, it is the moment when their deliverance is perfected and their full union with Christ is realized.