A Christian is supposed to be on the watch-out for false prophets and teachers; He is to be alert. Otherwise, he will be deceived. A Christian should not be presumptuous about false teachers. The reason a Christian must always watch against false prophets is that a false prophet will never present himself as one. “He comes in sheep's clothing, but inwardly, he is a ferocious wolf.” In their deceptive schemes, they will pretend to be true teachers. They could even perform miracles and display all sorts of virtues of a true Christian teacher momentarily to deceive.
Due to this deceptive nature of false teachers, Christians have the responsibility to guard against the activities of false teachers. The fundamental way to know a false teacher is through his lifestyle and character. Jesus says, “By their fruit, you will recognize them. Do people pick grapes from thorn bushes or figs from thistles? Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit (- 7:16-18)."
What one teaches is not enough to qualify him as a true teacher of the Word. Eloquence or good skills of communication does not also determine a true teacher of the Scripture. A false teacher with good communication skills at some point can teach sound biblical doctrine and still be a false teacher. Character is what determines whether a person is a true teacher or a false teacher. What one teaches must be from be from live application. A false teacher is not only someone who teaches what is wrong but someone whose life is also oppose to what he teaches. A true teacher of the gospel does not only teach from the intellectual knowledge of the Word but from the practical life of the word i.e. from the live experience of the Word. For a teacher's conduct to contradict what he teaches simply means he teaches what he is not and that makes him nothing less than a hypocritical teacher.
If there is one thing the contemporary church has failed woefully to do, this is it! If there is one thing that has mostly led to the fall of evangelicalism, it cannot be more than this! And if there is something the church needs to do to revive, I suppose it must be this! The church, like the New Testament Church (Apostolic Church), must once again call sin a sin and call sinners sinners; sinners must be seen as sinners and given their rightful place in the church. Until this is done, the church will continue to languish in the hands of false teachers who parade our altars as “men and servants of God.” Men who know no God nor care not for His church but use the church to achieve their selfish goals.