The kingdom of heaven and eternal life
The main message that God and Jesus gave in the four Gospels was the message about the kingdom of heaven and eternal life.
Anyone who does not believe this message dose not believe in Jesus or his word, because the scriptures cannot be broken (Jn 10:35).
There are two kingdoms of heaven in the Bible. One is the spiritual kingdom located in heaven, and other is the physical kingdom that is fulfilled here on earth. There are also two kinds of eternal life; spiritual and physical. What does this mean?
* The kingdom of heaven in the spiritual and physical worlds
The kingdom of heaven in Rev 4 and 21 is the kingdom in the spiritual world.
Moses made the tabernacle according to the pattern he saw in heaven (Heb 8:5), and God came to dwell there (Ex 25:22). Jesus called himself the temple and the kingdom of heaven because God was dwelling with him (Mt 13:24, 37).
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Jesus asked in the Lord's Prayer for God's will to be done on earth as it is heaven (Mt 6:10). He also said that the gathering place for believers on this earth is the kingdom of heaven (Mt 8:11). People who fail to believe the words of these promises misunderstanding the Bible.
*Spiritual and physical eternal life
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Considering John’s testimony in Rev 21:1-4 and that of Paul in Ro 8:11, life can be given even to a mortal body if God dwells within it. It is also written, “ ... Death will not exist any more – or mourning, or crying, or pain, for the former things have ceased to exist,” (Rev 21:4). Paul said, “Now when this perishable puts on the imperishable, and this mortal puts on immortality, then the saying that is written will happen, ‘Death has been swallowed up in victory,’” (1Co 15:51-54). The scriptures also say, “ ... They will be priests of God and of Christ, and they will reign with him for a thousand years,” (Rev 20:6b); “ ... They will reign forever and ever,” (Rev 22:5).
Why would we believe in Jesus if there were no such thing as eternal life? Eternal life is in God’s hands, regardless of whether you are referring to the spirits or the flesh. It is only applicable, however, to people who become new creations; people who are born again. The “dead,” whose flesh have died in the Lord, will be raised as spirits. Those who are alive and remain until the coming of the Lord will live with Jesus for a long time just as people lived a long time before Adam sinned. Having faith in this idea is the true meaning of carrying out a life of faith. If there is a natural body, there is a spiritual body as well (1Co 15:44).
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