Theological – Eschatological question was asked: “What do you say is the overall theme of the Bible?“
The overall theme of the Bible is Elohim’s restoration of holiness, righteousness, peace, to His eternal Kingdom disrupted by a rebellious cherub angel and unfaithful angels that followed in the Great Kingdom Rebellion – a spiritual war of unfathomable proportions (Genesis 3:15; Ezekiel 28:11-19; Isaiah 14:12-17; Revelation 12; Luke 10:18; John 8:44).
Elohim’s eschatological plan is to use this temporary Earth, Time, as a repository for this destructive spiritual war; this, apart from the Spiritual Kingdom and to “to destroy the works of the devil” via Messiah (Genesis 3:15; 1 John 3:8b) via a battle strategy known as the “Gospel” that was ordained “before Time began” (Genesis 3:21; 2 Timothy 1:8-10); the Gospel being an eschatological plan involving victory for Elohim over the Devil (Revelation 20:10) via selfless love demonstrated by Messiah at Golgotha and declared complete with the words “It is finished” (John 19:30); this, in order that volitional love and intimate relationship between Elohim and His faithful angelic creation would be unimpeded, secure, eternally.
The role of mankind in this spiritual war that rages around us and through us is to choose whom we will serve. We are provided the option to honor the Father by faith and trust in His Son, Jesus Christ, and live with Him eternally in victory (John 3) – or – we can choose to reject the Father’s will and honor Satan and suffer a fate similar to that of Satan in eternity (Revelation 20:10-15). The central theme of the Bible is not hidden nor is it a mystery.