Endings: please explain

The end of the world and the start of a new one! 

Before the millennium, we have the tribulation of Israel (the Day of the Lord) and the Second Coming of Jesus (Revelation chapter 20)

When you read the Old Testament prophets, you will notice that whatever else they are talking about, they always seem to return to the idea that at some future time, the people of Israel will be subjected to great tribulation, and will be rescued from this trouble by a Messiah. Many of them will die in this tribulation, which will culminate in a battle (sometimes referred to as Armageddon) and the salvation of the city of Jerusalem. The messiah will then usher in an age of prosperity for the remnant of the Jews that has survived that tribulation, in the land of Israel
When grace and truth embrace as lovers’ do
When mercy does atonement’s flames imbue
When worthy deeds take on redemption’s hue
Then broken innocence reformed all things will make anew

New World Headquarters - Jerusalem! 
What's all this about a millennium kingdom on earth presided over by Jesus?
The thousand years reign on earth of Jesus Christ 
(the millennium of Revelation 20:1-6)
The bible contains a lot of references to a time when a Messiah (Christians refer to him as Jesus), rules with an iron rod of justice and runs the world from Jerusalem. It is a time of great prosperity, not only for the Jews who assist the Messiah, but also for the citizens of the world who profit from his reign.
For a thousand years, the Messiah reigns on earth from Jerusalem with 
•	Those to whom judgment has been committed
•	Those who had been beheaded for the testimony to God and the word, and who have not worshipped the beast (more about the beast shortly).
When banality in chains is brought down low
When living water springs from Mount of Olives groves
When wealth of nations Zion-wards does flow
Then leafy boughs on Zion’s streets atonement’s fruit will grow

Before the old earth passes away and the new one is revealed, Jesus has been reigning on earth for 1000 years, but this utopian situation is interrupted

Satan's last fling and final judgment - Gog and Magog make war on the millennium earthly kingdom of Jesus Christ (Revelation 20:7-14)
You have heard of the last judgement - all the jokes about Peter at the pearly gates, the fires of hell - etc. This is it folks!
The Messiah has been running the earth from Jerusalem for the last thousand years, but Satan deludes the nations, (Gog and Magog) which are at the four corners of the earth. They mass their armies and surround Jerusalem but are consumed by fire.
And then Satan is thrown into the lake of fire and brimstone where he joins some characters you will have encountered earlier - the beast and false prophet - to be tormented day and night forever and ever.
The dead are then judged by what they have done - it is all recorded in books which are produced at the last judgment. It is possible that these books may be the little scroll referred to in Revelation 10 – a personal history for each and every human being. 
Death is then thrown into the lake of fire - along with those whose names are not entered into another volume, which is referred to as the book of life.
However those whose names do appear in the book of life escape this judgment and proceed to the new heaven and new earth. This fits in with the teaching that those who have the appropriate relationship to God have had their sins judged already and their punishment has been taken by Christ.
When Magog’s envy breaks its proper bounds
When noisome war once more on earth resounds
When evil is at last put down
Then grace and truth on new formed earth and heaven will abound

And a New Relationship between God and Man
Then I saw a new heaven and a new earth, for the first heaven and the first earth had passed away, and there was no longer any sea. 
I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband. 
And I heard a loud voice from the throne saying, "Now the dwelling of God is with men, and he will live with them. They will be his people, and God himself will be with them and be their God. 
What's it like in the new Jerusalem?
You really want to know? Read all about it in Revelation 21 and 22. The description is a bit abstract (not to say abstruse). But short of dying and going there yourself, there’s not a lot of information available. Maybe Dante’s best guess at the end of Paradise might be useful.

Fall of Mankind - Satan has title deeds to earth

God makes covenants to redeem mankind from Satan 

First Coming of Jesus Birth, Death, Resurrection

The period of Grace for the Gentiles

Great Tribulation of Children of Israel

Day of Lord Second Coming of Jesus

Millenium Jesus rules earth for a thousand years

New heaven 
New earth


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