Apostasy (or falling away) always begins in the mind. These spirits are “deceitful” and they teach doctrines that sound biblical but are just slightly off. They are out to fool you in your thinking. But God’s people believe and know the truth. We need to be careful here. On one extreme, there is a wide movement in the American church that minimizes truth. This side says, “They will know we are Christians by our love,” and so they adopt a “peace at any cost” position that dilutes and ultimately destroys essential Christian truth. They emphasize tolerance and doctrinal diversity. If you speak out against error, this side accuses you of being unloving and divisive. But if you go down that road, you end up with the unbiblical view that truth doesn’t matter and that there is no such thing as sound doctrine.