The vision explained

^6a Then I noticed that the woman was drunk with the blood of the saints and of the martyrs for Jesus.

^6b-8 As I watched her, I was filled with utter amazement, but the angel said to me, “Why are you amazed? I will explain to you the mystery of the woman and of the animal with seven heads and ten horns which carries her. The animal, which you saw, once lived but now is no more—it will come up out of the pit only to meet with destruction. The inhabitants of the earth, whose names have not been written in the book of life from the foundation of the world, will be utterly astonished when they see that the animal was, and is not, and yet is to come.