Death, being the wages of sin, why are not the righteous delivered from death, seeing all their sins are forgiven in Christ?
The righteous shall be delivered from death itself at the last day, and even in death are delivered from the sting and curse of it; (1 Cor. 15:26,55–57, Heb. 2:15) so that, although they die, yet it is out of God’ s love, (Isa. 57:1–2, 2 Kings 22:20) to free them perfectly from sin and misery, (Rev. 14:13, Eph. 5:27) and to make them capable of further communion with Christ in glory, which they then enter upon. (Luke 23:43, Phil. 1:23)
The Westminster Larger Catechism: With Scripture Proofs. (Oak Harbor, WA: Logos Research Systems, Inc., 1996).