'Secret' in the Bible

the secret of the seven stars that thou hast seen upon my right hand, and the seven golden lamp-stands: the seven stars are messengers of the seven assemblies, and the seven lamp-stands that thou hast seen are seven assemblies.

but in the days of the voice of the seventh messenger, when he may be about to sound, and the secret of God may be finished, as He did declare to His own servants, to the prophets.

and upon her forehead was a name written: 'Secret, Babylon the Great, the Mother of the Whores, and the Abominations of the earth.'

and the messenger said to me, 'Wherefore didst thou wonder? I -- I will tell thee the secret of the woman and of the beast that is carrying her, which hath the seven heads and the ten horns.