For a man to say that there are believers among those who sit under a false gospel, is a compromise of the gospel and a belittling of the power of the Lord's hand to save. Not one place in scripture do we find the Lord saving a person and leaving them under the power and influence of lies. The fact is scripture declares that Christ brings his sheep out from among the unclean when he calls them by name; they hear his voice and follow him. On the other hand, it is Satan's mode of operation to sow tares among the wheat; it is wolves who creep in among the sheep unawares; never the other way around.