"And write [this] to the angel of the church at Philadelphia: These are the words of Him who is holy and true, [and] who possesses the key [i.e., the power and authority] of King David, [and] who opens [a door] which no one will close, and who closes one that no one will open:

[When] the fifth angel sounded its trumpet, I saw a star that had fallen from the sky to the earth. And the key to the shaft leading to the deep pit [Note: This is thought to be the place where the devil and his demons live] was given to him.

Then the voice which I had heard from heaven spoke to me again, saying, "Go [and] take the open book [being held] in the hand of the angel [See verse 2], who is standing on the ocean and on the land."

If anyone goes [or "leads others"] into captivity, he will go into captivity [himself]; if anyone is killed [or "kills others"] with the sword, he will be killed with the sword [himself]. Here is [where] God's holy people [need] perseverance and faith.

Then I heard a loud voice from the Temple saying to the seven angels, "You [angels], go and pour out the seven bowls of God's wrath upon the earth."

For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.

The beast you saw once existed, but now does not, and [yet] is about to come up out of the pit and go to [his] destruction. And those people living on the earth, whose names have not been recorded in the book of life from the creation of the world, will be amazed when they see the beast, because he had once existed, but now does not, and yet will come [again].

And the beast that once existed, but now does not, is actually the eighth one [i.e., head/hill/king. See verse 9], and yet he belongs to the seven; and he will go to his destruction.

Then I saw an angel coming down from heaven, holding the key to the pit and a huge chain in his hand.

and he will [again] go out to deceive the nations which are [located] throughout the whole world --- Gog and Magog. [Note: Based on Eze. 35-40, it appears that these names are used here figuratively for all the forces of wickedness which are enemies of God]. Satan will assemble them together for battle, and they will be as numberless as the sand on the seashore.