o Physical: the union of the soul and spirit of a human with the body in the earthly sphere
o Spiritual: the union of the soul and spirit of a human with The God through the reconciliation made possible by Jesus as our High Priest offering His Blood on the true Mercyseat of Heaven to completely satisfy The God's righteous demands so that The Father could forgive our sins, hold guiltless, and offer sonship to all those who completely and persistently trust on Jesus as both Lord and Christ
oEternal: the reunion of the soul and spirit of the obedient, Christ-trusting human with the new body which shall never die again, in union with The God in His Paradise of Heaven, to enjoy Him forever
Three kinds of death:
o Physical: Physical death is the separation of the soul and spirit of the human from the body (Heb. 9:27)
o Spiritual: the separation of the soul and spirit of a human from The God, a state into which the human is born (Eph. 2:1-5) but from which the human can be rescued by an unchangable belief on the Lord Jesus Christ resulting in new birth in the Spirit (Jn. 3:3, 5, 16)
o Eternal: the permanent rejoining of the disobedient human with the old sin-ridden body, separated from any fellowship from God or other beings forever and joining the devil and his fallen angels in a place of torment, the Eternal Lake of Fire, the terminal repository of death and Hell (Rom. 6:23; Rev. 21:8, 20:10-15; Mt. 25:41)
At the crucifixion the Man Jesus suffered an agonizing sacrificial substitutionary death, experiencing both the wrath of humans because He represented Himself as God, and the wrath of The God on behalf of all humankind, for three hours of earthly time, but infinitely in the Lake of Fire in Eternal time.
This is the price of forgiveness obtained for us by the wounding to bloodshed, death, and roasting which The God requires for atonement to be effected and remission of sins to be proffered (Num. 15:25-26). The penalty for sinning is burning in the outer darkness of the Lake of Fire in flames and brimstone forever.
This is the punishment due Adam and all his flesh, excepting those who have trusted in the Messiah to come, and it must be paid.
If the lost have only eternal nothingness to look forward to, I don’t see how that could be something for them to fear and propel them to saving faith in Christ.
The body is dead. There is no “rejoining” of the body to the spirit. It’s gone. Same is true for the believer. The believer gets a new body. The non-believer is destroyed. It’s why the bible calls it the second death.
The bible uses the words “death” or “die” a LOT to describe the fate of the lost. Starting in Genesis.