1. Revelation was written to comfort persecuted Christians in Asia Minor

Revelation 1:4
John, To the seven churches in the province of Asia: Grace and peace to you from him who is, and who was, and who is to come, and from the seven spirits before his throne,

2. It describes events that would "shortly take place"

Revelation 1:1-3
1 The revelation of Jesus Christ, which God gave him to show his servants what must soon take place. He made it known by sending his angel to his servant John,
2 who testifies to everything he saw--that is, the word of God and the testimony of Jesus Christ.
3 Blessed is the one who reads the words of this prophecy, and blessed are those who hear it and take to heart what is written in it, because the time is near.

Revelation 22:6,10
6 The angel said to me, "These words are trustworthy and true. The Lord, the God of the spirits of the prophets, sent his angel to show his servants the things that must soon take place."
10 Then he told me, "Do not seal up the words of the prophecy of this book, because the time is near.

3. Such Christians were assured that Christ would be victorious

Revelation 17:14
They will make war against the Lamb, but the Lamb will overcome them because he is Lord of lords and King of kings--and with him will be his called, chosen and faithful followers."

a. Over the harlot, first supported by the beast and then devoured by it

Revelation 17:3,16
3 Then the angel carried me away in the Spirit into a desert. There I saw a woman sitting on a scarlet beast that was covered with blasphemous names and had seven heads and ten horns.
16 The beast and the ten horns you saw will hate the prostitute. They will bring her to ruin and leave her naked; they will eat her flesh and burn her with fire.

b. Over the beast and the false prophet, puppets of Satan

Revelation 13:1-4,11-12
1 And the dragon stood on the shore of the sea. And I saw a beast coming out of the sea. He had ten horns and seven heads, with ten crowns on his horns, and on each head a blasphemous name.
2 The beast I saw resembled a leopard, but had feet like those of a bear and a mouth like that of a lion. The dragon gave the beast his power and his throne and great authority.
3 One of the heads of the beast seemed to have had a fatal wound, but the fatal wound had been healed. The whole world was astonished and followed the beast.
4 Men worshiped the dragon because he had given authority to the beast, and they also worshiped the beast and asked, "Who is like the beast? Who can make war against him?"

11 Then I saw another beast, coming out of the earth. He had two horns like a lamb, but he spoke like a dragon.
12 He exercised all the authority of the first beast on his behalf, and made the earth and its inhabitants worship the first beast, whose fatal wound had been healed.

Revelation 19:20
But the beast was captured, and with him the false prophet who had performed the miraculous signs on his behalf. With these signs he had deluded those who had received the mark of the beast and worshiped his image. The two of them were thrown alive into the fiery lake of burning sulfur.

c. Over Satan himself, first by binding him for a long time

Revelation 20:1-3
1 And I saw an angel coming down out of heaven, having the key to the Abyss and holding in his hand a great chain.
2 He seized the dragon, that ancient serpent, who is the devil, or Satan, and bound him for a thousand years.
3 He threw him into the Abyss, and locked and sealed it over him, to keep him from deceiving the nations anymore until the thousand years were ended. After that, he must be set free for a short time.

4. The Christians in Asia Minor were also comforted by scenes in the distant future, similar to how Isaiah comforted his contemporaries by looking to the future.

a. The ultimate end of Satan

Revelation 20:7-10
7 When the thousand years are over, Satan will be released from his prison
8 and will go out to deceive the nations in the four corners of the earth--Gog and Magog--to gather them for battle. In number they are like the sand on the seashore.
9 They marched across the breadth of the earth and surrounded the camp of God's people, the city he loves. But fire came down from heaven and devoured them.
10 And the devil, who deceived them, was thrown into the lake of burning sulfur, where the beast and the false prophet had been thrown. They will be tormented day and night for ever and ever.

b. Deliverance from condemnation at the Judgment

Revelation20:11-15
11 Then I saw a great white throne and him who was seated on it. Earth and sky fled from his presence, and there was no place for them.
12 And I saw the dead, great and small, standing before the throne, and books were opened. Another book was opened, which is the book of life. The dead were judged according to what they had done as recorded in the books.
13 The sea gave up the dead that were in it, and death and Hades gave up the dead that were in them, and each person was judged according to what he had done.
14 Then death and Hades were thrown into the lake of fire. The lake of fire is the second death.
15 If anyone's name was not found written in the book of life, he was thrown into the lake of fire.

c. The eternal blessedness of the heavenly city

Revelation 21:1-22:5
1 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.
2 I saw the Holy City, the new Jerusalem, coming down out of heaven from God, prepared as a bride beautifully dressed for her husband.
3 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.
4 He will wipe every tear from their eyes. There will be no more death or mourning or crying or pain, for the old order of things has passed away."
5 He who was seated on the throne said, "I am making everything new!" Then he said, "Write this down, for these words are trustworthy and true."
6 He said to me: "It is done. I am the Alpha and the Omega, the Beginning and the End. To him who is thirsty I will give to drink without cost from the spring of the water of life.
7 He who overcomes will inherit all this, and I will be his God and he will be my son.
8 But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practice magic arts, the idolaters and all liars--their place will be in the fiery lake of burning sulfur. This is the second death."
9 One of the seven angels who had the seven bowls full of the seven last plagues came and said to me, "Come, I will show you the bride, the wife of the Lamb."
10 And he carried me away in the Spirit to a mountain great and high, and showed me the Holy City, Jerusalem, coming down out of heaven from God.
11 It shone with the glory of God, and its brilliance was like that of a very precious jewel, like a jasper, clear as crystal.
12 It had a great, high wall with twelve gates, and with twelve angels at the gates. On the gates were written the names of the twelve tribes of Israel.
13 There were three gates on the east, three on the north, three on the south and three on the west.
14 The wall of the city had twelve foundations, and on them were the names of the twelve apostles of the Lamb.
15 The angel who talked with me had a measuring rod of gold to measure the city, its gates and its walls.
16 The city was laid out like a square, as long as it was wide. He measured the city with the rod and found it to be 12,000 stadia in length, and as wide and high as it is long.
17 He measured its wall and it was 144 cubits thick, by man's measurement, which the angel was using.
18 The wall was made of jasper, and the city of pure gold, as pure as glass.
19 The foundations of the city walls were decorated with every kind of precious stone. The first foundation was jasper, the second sapphire, the third chalcedony, the fourth emerald,
20 the fifth sardonyx, the sixth carnelian, the seventh chrysolite, the eighth beryl, the ninth topaz, the tenth chrysoprase, the eleventh jacinth, and the twelfth amethyst.
21 The twelve gates were twelve pearls, each gate made of a single pearl. The great street of the city was of pure gold, like transparent glass.
22 I did not see a temple in the city, because the Lord God Almighty and the Lamb are its temple.
23 The city does not need the sun or the moon to shine on it, for the glory of God gives it light, and the Lamb is its lamp.
24 The nations will walk by its light, and the kings of the earth will bring their splendor into it.
25 On no day will its gates ever be shut, for there will be no night there.
26 The glory and honor of the nations will be brought into it.
27 Nothing impure will ever enter it, nor will anyone who does what is shameful or deceitful, but only those whose names are written in the Lamb's book of life.

22:1 Then the angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb
2 down the middle of the great street of the city. On each side of the river stood the tree of life, bearing twelve crops of fruit, yielding its fruit every month. And the leaves of the tree are for the healing of the nations.
3 No longer will there be any curse. The throne of God and of the Lamb will be in the city, and his servants will serve him.
4 They will see his face, and his name will be on their foreheads.
5 There will be no more night. They will not need the light of a lamp or the light of the sun, for the Lord God will give them light. And they will reign for ever and ever.