'Secret' in the Bible

The secret of the seven stars you saw in My right hand and of the seven gold lampstands is this: The seven stars are the angels of the seven churches, and the seven lampstands are the seven churches.

Then the angel said to me, “Why are you astonished? I will tell you the secret meaning of the woman and of the beast, with the seven heads and the 10 horns, that carries her.