Revelation 17:9
(This requires a mind that has wisdom.) The seven heads are seven mountains the woman sits on. They are also seven kings:
Revelation 13:18
This calls for wisdom: Let the one who has insight calculate the beast's number, for it is man's number, and his number is 666.
Revelation 17:3
So he carried me away in the Spirit to a wilderness, and there I saw a woman sitting on a scarlet beast that was full of blasphemous names and had seven heads and ten horns.
Daniel 12:4
"But you, Daniel, close up these words and seal the book until the time of the end. Many will dash about, and knowledge will increase."
Daniel 12:8-10
I heard, but I did not understand. So I said, "Sir, what will happen after these things?"
Hosea 14:9
Who is wise? Let him discern these things! Who is discerning? Let him understand them! For the ways of the Lord are right; the godly walk in them, but in them the rebellious stumble.
Matthew 13:11
He replied, "You have been given the opportunity to know the secrets of the kingdom of heaven, but they have not.
Matthew 24:15
"So when you see the abomination of desolation -- spoken about by Daniel the prophet -- standing in the holy place (let the reader understand),
Revelation 13:1
Then I saw a beast coming up out of the sea. It had ten horns and seven heads, and on its horns were ten diadem crowns, and on its heads a blasphemous name.
Revelation 17:7
But the angel said to me, "Why are you astounded? I will interpret for you the mystery of the woman and of the beast with the seven heads and ten horns that carries her.
Revelation 17:18
As for the woman you saw, she is the great city that has sovereignty over the kings of the earth."