You'll recall from chapter 5 of the revelation that John "saw in the right hand of him who sat on the throne a scroll with writing on both sides and sealed with seven seals." Today I looked at chapter 6. [Note: Just sort of reading a snippet every morning, I'm working my way through without the assistance of scholarly work. Maybe I'll go back after taking advantage of such things.]
In chapter 6, the returning Christ begins opening the seals. Most famous is surely the fourth seal:
When the Lamb opened the fourth seal, I heard the voice of the fourth living creature say, "Come!" I looked, and there before me was a pale horse! Its rider was named Death, and Hades was following close behind him. They were given power over a fourth of the earth to kill by sword, famine and plague, and by the wild beasts of the earth.
I wonder why it is so famous. I guess it has a cool rhythm to it. Sort of like, Oppenheimer's famous, "I am become death, destroyer of worlds," which wikipedia reports to be mistakenly quoted from a verse in the Bhagavad Gita. (I didn't know it was a mistakenly quoted.)
So, lots of this chapter seems to be about Christ unleashing terrible events on the Earth. I suppose that is to be comforting in the sense that it is vengeance for the terrible circumstances of Christians at the time. The closing verses seem to suggest as much:
Then the kings of the earth, the princes, the generals, the rich, the mighty, and every slave and every free man hid in caves and among the rocks of the mountains. They called to the mountains and the rocks, "Fall on us and hide us from the face of him who sits on the throne and from the wrath of the Lamb! For the great day of their wrath has come, and who can stand?"