If the mystery of godliness is demonstrated by God manifest in the flesh:

I Timothy 3:16 And without controversy great is the mystery of godliness: God was manifest in the flesh, justified in the Spirit, seen of angels, preached unto the Gentiles, believed on in the world, received up into glory.

Then will the mystery of iniquity be demonstrated by the devil manifest in the flesh, the antichrist?

II Thessalonians 2:7 For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.

  8 And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:

  9 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,