2 John 1:7-9 NIV
[7] I say this because many deceivers, who do not acknowledge Jesus Christ as coming in the flesh, have gone out into the world. Any such person is the deceiver and the antichrist. [8] Watch out that you do not lose what we have worked for, but that you may be rewarded fully. [9] Anyone who runs ahead and does not continue in the teaching of Christ does not have God; whoever continues in the teaching has both the Father and the Son.
Just as the early church was warned about false teachers so are we. There are those who are trying to deceive us and they represent themselves as being followers of Jesus but they deny the truths of who Jesus really is. Just because someone claims to be a Christian and is a dynamic and charismatic speaker does not mean that he is preaching truth. All teachings are to be weighed against the truth of the word of God and anyone who claims that something other than the word is true is a false teacher and a deceiver who is living to separate true believers from the Father and the Son. Know the word of God so well that you can recognize those who are anti-Christ because knowing the real things is the best way to recognize a counterfeit.