The apostle John signifies this is a mark of a false believer: “They went out from us, but they were not really of us; for if they had been of us, they would have remained with us; but they went out, so that it would be shown that they all are not of us” (1 John 2:19).
Sapagkat kung sila'y tunay na atin, nanatili sana silang kasama natin. Ngunit umalis sila, kaya't maliwanag na silang lahat ay di tunay na atin (1 Juan 2:19).