Jesus told us to watch out for false prophets. If they were powerless to deceive born again Christians, I don’t think Jesus would have told us to “take heed”.
In this article, I show how true Christians can become false prophets. The Bible clearly shows that there are men who start off hearing and obeying the LORD God, who end up as soothsayers and destroyers of God’s people.
The New Testament warns us in 2 Peter 2 and the Book of Jude to watch out for arrogant, money loving preachers. Paul warned us against the times when people would heap up teachers who tell them what their itching ears want to hear. You won’t hear too many expositions of these passages on Christian TV today. What a pity, they were never more needed.