NLT: Without question, this is the great mystery of our faith : Christ was revealed in a human body and vindicated by the Spirit. He was seen by angels and announced to the nations. He was believed in throughout the world and taken to heaven in glory.
KJV: And without controversy great is the mystery of godliness: God (Theos) 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.
Every modern version has omitted "God" (and every Greek manuscript has "God") yet the whole point of this verse is to teach us that Jesus is GOD. There are many cults which deny this including the Jehovah's Witnesses, Unitarians, Scientology, Christadelphians etc.