But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction. And I saw three unclean spirits like frogs come out of the mouth of the dragon, and out of the mouth of the beast, and out of the mouth of the false prophet. And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone. And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever.
False prophets come in peace, but have another agenda.
They come looking like one thing when, in fact, they are another. No matter what someone pretends to be, what they are will always come to the surface and become manifest to everyone. False prophets are capable of showing signs and wonders. Jesus, Himself, rebuked people for pursuing Him because of miracles, referring to them as things that do not endure. The false prophet BarJesus sought to turn Sergius Paulus away from the faith.