If multiple lives were in the mix, then the death and resurrection of Jesus Christ was a waste. It is given "man once to live and then the judgment" means that we either join Christ in heaven or spend eternity in the lake of fire.
JUDGMENT
Discernment or separation between good and evil. God judges among people and their actions according to the standards of His LAW. Judgment can refer either to this process of discernment or to the punishment meted out to those who fall under His wrath and condemnation (John 5:24).
In the Bible the most important judgment is the final judgment, the ultimate separation of good and evil at the end of history. The precise time of this judgment is appointed by God (Acts 17:31), but it remains unknown to man (Matt 24:36). The return of the Lord to earth, the resurrection of the dead, and the final judgment, together with the end of the world-all these may be thought of as belonging to a single complex of events at the end of time.
From earliest times it has been recognized that God Himself is the Judge of mankind (Gen 18:25), and that He has the power and wisdom to judge with righteousness, truth, and justice (Ps 96:13; 98:9). The final judgment is a task given specifically to God's Son (John 5:22; Acts 17:31) to conclude His work as mediator, deliver His people from sin, and destroy all God's enemies. God's people are associated with Christ in the exercise of this judgment (1 Cor 6:2-3; Rev 20:4).
The final judgment will be comprehensive in scope; it will include all people and nations from the beginning of the world to the end of history (Matt 25:31-46; Rom 14:10-12), as well as fallen angels (2 Peter 2:4). Those who trust in the Lord, repent of sin, and walk in His ways will not be condemned but will enter into eternal life (Ps 1). The purpose of the final judgment is the glory of God through the salvation of the ELECT and the condemnation of the ungodly (2 Thess 1:3-10).
The final judgment has been anticipated throughout history in a series of judgments brought by God upon the wicked. The whole world was affected by the FLOOD and by the confusion of tongues at the Tower of BABEL (Gen 6-8; 11:1-9). The heathen nations, such as the Egyptians and Canaanites, also experienced God's judgments, just as God's people, the Israelites, did when they persisted in rebellion. These judgments serve as a continual warning of the consequences of unbelief.
The death of Jesus Christ is unique among these judgments of history. Through His death God paid the judgment price demanded by mankind's sin. The death and resurrection of Jesus are the foundations on which sinners are saved (Isa 53:5) through their trust in Him as Lord and Savior.
God's role as judge is reflected in the leadership functions of political officials, who uphold order in society and execute judgment on evildoers (Rom 13:1-7). The rulers of Israel bore special responsibility in this respect (Deut 16:18-19), as do the leaders of the church today (Matt 18:17-18 ). Believers also have a responsibility to judge matters of wrongdoing among themselves (Matt 18:15), but this should always be done fairly and with compassion. Believers are never to take over the task of judgment that belongs to God alone (Heb 10:30).
(from Nelson's Illustrated Bible Dictionary, Copyright (c)1986, Thomas Nelson Publishers)