Jesus Christ and The Deed to The Kingdoms of The World

Once, when Jesus was at the absolute end of Himself, starving, thirsty, in terrible agony, the devil appeared to Him, and showed Him the kingdoms of the world, and said "If you fall down and worship me, all these I will give you, for they are delivered to me..."
Jesus responded, "Begone, Satan, for it is written, you shall worship God, and Him ONLY."
As Matthew and Luke tell us, Satan left Him, because he had tempted Jesus in every way he could think of, and Jesus refused him and whatever he had to offer.
But Satan lied. The kingdoms of the world were only his temporarily, and only partially. When the Lord Jesus opens the scroll, one seal at a time, He is asserting His permanent ownership of the kingdoms of the world.

Here's what Revelation tells us as the 7th seal is opened:

11:15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.

So the opening of these seals is the reclamation of the world (and, indeed, of this whole creation) for God and His Son, The Lord Jesus Christ.

The world is reclaimed with violence.  As much as we deplore violence, when evil holds power over something, it takes judgments of violence to overwhelm it and overcome it.  This has been true since the beginning of the world.  The first example of this is the Flood of Noah, but there are many others. This is the greatest of all, because as each seal is opened, unprecedented and miraculous events begin to occur.  

Of course, the question is, where are you spiritually?  When the seals are opened, there are judgments on those who reject God and the Lord Jesus. Very early in this process, as the 6th seal is opened, the following occurs:

(Revelation 6)

12 And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood;

13 And the stars of heaven fell to the earth, just as a fig tree casts away  her unripe figs, when it is shaken by a mighty wind.

14 And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places.

15 And the kings of the earth, and the great men, and the rich men, and the chief captains, and the mighty men, and every bondman, and every free man, hid themselves in the dens and in the rocks of the mountains;

16 And said to the mountains and rocks, Fall on us, and hide us from the face of him who sits on the throne, and from the wrath of the Lamb:

17 For the great day of his wrath is come; and who shall be able to stand?

The point, of course, is that the people above recognize what's happening and who the source is. 

I doubt that you want to wait until those future days to make sure of your own relationship with the Almighty.  Those who are not "friends of God" in those days will be very much at risk.  They will fear what's coming, be unable to stop it, and finally vainly attempt to fight back, only to be completely destroyed.

so the main question that the book of Revelation asks is, "What about you? Where are you in your own spiritual life?"

The answer that God wants you to receive is the invitation at the end of Revelation:

22:17 The Spirit and the bride say, "Come." And let the one who hears say, "Come." And let the one who is thirsty come; let the one who wishes take the water of life without cost.

As Jesus said, so many years ago: "If anyone thirsts, let him come to Me and drink; out of his inmost being, as the Scripture has said, shall flow rivers of living water."

You can move from being a thirsty, dying man or woman to being a source of life for all around you, by the simple expedient of coming to Jesus Christ and drinking of the fountain of life, for the water that He gives becomes in you a well of water, springing up into everlasting life."