"The perfect and only God always existed. This God is one, but also three, because being so great, in love and life, He beheld His own son. This son was with Him always. The three– Father, Son and His Spirit, are absolutely joyfilled in their fellowship, and were greatly glorified.
Wishing to share this great glory, joy, love and fellowship, God created all things, from time, to space, to matter, to people. To share in the greatest joy, glory and love, people would have to find them in their source– God Himself. They would have to live in a way that honoured the source– in God's right ways. Living in God's ways says He rules in their lives and thus, establishes His kingdom. God wanted people to love Him truly and freely, not because He commanded them to, so He gave people freewill to choose: live in His right ways, or in their own ways.
However, existing outside of time, God already saw through all history that people would choose their own selfish and temporary pleasures. Turning away from the source of life meant that people would have to loose eternal life and absolute joy; they instead would die. So God, before creating, established a masterplan with a secret key which would allow creation to not die, but live in His joy. This secret key was His own son who was with Him before all creation began.
He gave His son, in the place of all created man, to be put to death to ensure that selfish creation that chose the path of eternal death, could be given a chance to choose eternal life instead.
Because this son was put to death, the penalty for selfishly turning away from the source of life was paid. And because this son always lived in God's ways, he was completely innocent of all selfishness, and so when he was put to death, death itself lost to him, and the son was brought back to life!
Any Man or Woman, if:
• Repentant
• Believing that the son did indeed die for them and rose again to life
• Having changed, lived in God's ways
... were given eternal joy, life and glory! Just as the son died, and was brought back to life, mankind (though deserving death), could come back to choose life as well!
At the end of all Time and History, God's rule will be established– God's glorious kingdom come at last. God in fellowship with His people will live forever, glorifying God, and sharing in the greatest joy, fullness and purpose of life that could ever be conceived of."
