Every person is deceived in one way or another.
Let me explain, if anyone thinks they have all the right answers they do not understand God. For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts. When a person comes along and believes he is not deceived in any way this person is deceived already. Only through the study of the Word of God can error be dislodged. Must be a born-again believer before engaging in Spiritual warfare.