18 For on the one hand there is an annulling of the former commandment because of its weakness and unprofitableness, 19 for the law made nothing perfect; on the other hand, there is the bringing in of a better hope, through which we draw near to God. (Hebrews 7:18–19, NKJV)
The “former commandment” is “the law” given at Mt. Sinai to Israel. God annulled (set aside, abolished) that law because it was powerless to perfect (complete) the one who comes to God. The law served its purpose of identifying sin (Rom. 3:20; Gal. 3:19). It sought to rein in Israel’s sinful conduct by teaching her holiness and the divine blessings that come from obeying God (Deut. 4:13-14; 8:1). But that covenant was temporary and “made nothing perfect” (Gal. 3:19-25). The law did not have the power to redeem souls from sin; it could not save the lost (Heb. 10:1-4, 11). It was a “shadow of the good things to come” in Jesus Christ (Heb. 10:1). Christ and His gospel (not the “former commandment”) bring a better hope to those who draw near to God for forgiveness. We dare not go back to the law of Moses to justify our worship and service to God today. To do so forfeits the grace that is in Christ (Gal. 5:3-4; 1:6-9). Remember, we are not saved by the “shadow” (the first covenant) but by the “substance” of the covenant of Christ (Heb. 10:1-4, 10-12).
14 Then Death and Hades were cast into the lake of fire. This is the second death. 15 And anyone not found written in the Book of Life was cast into the lake of fire. (Revelation 20:14–15, NKJV)
Death and Hades will be overpowered and destroyed at the resurrection of the dead (1 Cor. 15:26). At the resurrection and judgment day, Christ (who has “the keys of Hades and of Death,” Rev. 1:18) will destroy death and the grave, fulfilling the prediction that “death will be swallowed up in victory” (1 Cor. 15:54-55). The “lake of fire” is the “second death,” the place of eternal punishment where the devil and his cohorts “will be tormented day and night forever and ever” (Rev. 20:10). Death will never claim another body. Hades will never hold another departed spirit. On the judgment day they will “die” – forever separated from the power and fear they have exerted against humanity. The “second death” has no power over those who have part in the “first resurrection,” for they share in Christ’s victory over sin and death (Rev. 20:4-6; 6:9-11). However, those who are not saved in Christ are not in the Book of Life. Their judgment will be the lake of fire, the second death. Hell is real. Hell is forever punishment, eternal separation from God and all this is good. It is outer darkness, filled with weeping and gnashing of teeth (Matt. 25:30; Mk. 9:43-48). Knowing these things beforehand should compel us by faith to repent and follow Jesus completely.