This teaching is confirmed by the Chosen Vessel thus: "know you not that you are the temple of God, and that the spirit of God dwells in you(1 Cor.3:16)? Of course, the spirit of God only dwells in the "Vessels of Mercy"(Rom.9:23).
Lots of people assembled for services with the Apostles and The Worldwide Church of God, but the majority of them were not called by God. If they had been called by God, the spirit of God would have dwelt in them, and they would never have fallen away from the church. But John was inspired to write: "They went out from us, but they were not all of us; for if they had been of us, they no doubt have continued with us: but they went out, that it might be made manifest that they were not all of us"(1 John 2:19). So these people were never temples of God.
I am well aware, of course, that Rod Meredith, Victor Kubic and the gang of hanger-ons, that have coalesced around UCG for a salary, Dave Havir, Dave Pack, Jerry flurry, David Hulme and a hosts of other misguided people, are of the perverse opinion that others have left the church, but they have not! Yet, all of these crazy men teach that Christ is divided, and God is the author of confusion. For members and ministers often leave one group to join another, when something is said or done that makes them more unhappy, than they current are! If that is not teaching that Christ is divided, then I don't know what is!