The Book of Revelation: Pathway to the Future...Revelation 1:7

I've refrained from making this a commentary about the book of Revelation. There are many of those, and I'd be repeating lots of information--besides, most commentaries on Revelation have to rely a great deal on speculation, which is often presented as assured conclusions.  I have my opinions, of course, but the most benefit for you is in reading Revelation, and thinking about the pathway to the future that it shows you.
Revelation is about the "unveiling of Jesus Christ." The Greek word "apokalupsis" means "unveiling"--so this book is about showing who Jesus is, what He's like right now, and what He will be like when He returns.
Revelation 1:7 says, "Behold, He comes with the clouds, and every eye shall see Him, and they also who pierced Him, and all the tribes of the earth shall mourn because of Him..."
So the event itself will be massive.  It will be like a volcanic eruption, a giant meteor strike, a hurricane--except this event will engulf the entire earth.  It will be the most significant event in human history since His first coming, and it will be visible to everyone. The text mentions two significant aspects to that event:
1. The people who "pierced Him" will see Him--I think that this means "the Jews and the Gentiles (in this case, Romans)," since the actual folks who murdered Jesus are no longer on the earth. It could mean the actual people who murdered Him.  We shall see.
2. "All the Tribes of the earth shall mourn..." I think that this particular statement means, "The people who never offered Him their allegiance and worship." Why? Because to those of us who believe in Him, His return is the thing that we eagerly await. We will be delighted.  Christians who are older often say, "I want to live until the Lord returns."
The question is, "Why all this mourning?" Well, the simple reason is that Jesus, as always, is going to produce division in the human race.
There will be those who confess Him, no matter what the cost to their eternal joy and delight.
There will be those who reject Him, and worship the Dragon, thinking that the Beast and the Dragon are the future of mankind. They are horribly wrong.  The reign of the Beast, and the final efforts of the Dragon fail in 42 months after they take power, and Jesus Christ becomes visible as the King of the Earth--a position He's always held, but thus far unacknowledged, except by His followers.
THIS produces "mourning" ("wailing" in the old KJV, "beat their breasts" in Greek)--they've bet on the wrong horse, so to speak, and their losses are everlasting and infinite.
The Old and New Testaments both agree on the statements I've just made. I could quote almost endlessly, but that's not necessary.  The book of Revelation is completely clear on this.
The simplest question to ask yourself today is, "Will I be happy to see Him? or will it be a day of everlasting loss and infinite sorrow?"

The Book of Revelation is about the future:

It's no secret that the following verse outlines the book of Revelation in broad strokes:
(Revelation 1:19)
"The things you've seen, the things which are, and the things which are coming after these things"
The lesser known fact is that "The things which are coming..." is the main focus of the book.
Revelation is a roadmap to eternity.  It records how God opens the door into eternity, and brings mankind into His kingdom.
For example, every admonition to the 7 churches in Revelation 2-3 ends with, "To him who overcomes..." and everyone who overcomes is promised some special thing in the future. "The now" is difficult.  It's full of trouble, suffering, anguish.  These are the products of the devil's work, of his rule over mankind, and of man's cooperation with him. Eternity is the gift of the Father, brought to us by the Son, and directed by the Holy Spirit.
All of Christianity is essentially about "Later." It's true that Jesus said, "I came that they might have life, and that they might have it abundantly," and that He meant life today as well as everlasting life, but the reality is that eternal life is the most important, if for no other reason than that it's the longest.
My Dad died at 92.  He had a "long life." Really!!?? 92 years out of eternity? It's nothing.  However, now he is IN eternity.  He will never die again. He will live without pain. He will live in beauty and happiness that can't even be imagined.
THIS is what the book of Revelation is about--how we get there--Revelation is the pathway into forever.
The road is not easy, that's for sure.  There are seals, horsemen, angels, monsters, demons, dictators, the ancient Serpent who bears our race so much hatred, wars, fire, destruction and more on the path. But at the end, eternity is going to happen. All the stuff in between? Temporary. Eternity? Forever. And ever.
There is a place for you there...
Jesus said, "I am the resurrection and the life; he who believes in me shall live, even if he dies; and he who lives and believes in Me shall never die..."
At the end of the book of Revelation (21:3-6), we read:
3 And I heard a great voice out of heaven saying, Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God.
4 And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
5 And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.
6 And he said unto me, It is done. I am Alpha and Omega, the beginning and the end. I will give unto him that is athirst of the fountain of the water of life freely.
Wouldn't you like to go there? Forever?
Life. Free. Eternal. Unending. No sorrow. No tears. No pain.  All the evil, gone.
It's a path you can take, and you will never regret it.