False teachers are with us and always have been. Being aware of the existence and presence of false teachers is something the disciple should always be aware of. Test your teachers. Test even those you trust. Test even those whom you have trusted in the past. Scripture is the standard, not what you already or want to believe.
“There were also false prophets among the people,
just as there will be false teachers among you.” (2 Peter 2:1)
There are no “ifs, ands, or buts” in Peter’s words. It’s a clear and definite statement. There were false prophets among the people (of Israel in the Old Testament). That’s a matter of history.
False prophets were a constant problem in the Old Testament, and those who falsely claimed to be prophets of God were to be stoned. The people rarely had the will to deal with them, so they multiplied, causing disaster to the spiritual life of God’s people.
In the same way Peter says, “There will be false teachers among you.” Notice the words “among you.” Peter is writing to the church and says, “There will be false prophets among you.” So he is not talking about New Age people on television. He is talking about people in the local church, members of a local congregation.
There is no such thing as a pure church this side of heaven. You will never find it. The wheat and the tares grow together. Warren Wiersbe writes:
Satan is the counterfeiter. . . . He has a false gospel (Galatians 1:6-9), preached by false ministers (2 Corinthians 11:13-12), producing false Christians (2 Corinthians 11:26). . . . Satan plants his counterfeits wherever God plants true believers (Matthew 13:38).
Authentic or Counterfeit?
How would you recognize counterfeit Christianity?
In 2 Peter 1 we read about genuine believers. And in 2 Peter 2 we read about counterfeit believers. If you put these chapters side by side you will see the difference between authentic and counterfeit believers.
1. Different Source—Where does the message come from?
Peter says, “We did not follow cleverly invented stories when we told you about the power and coming of our Lord Jesus Christ” (1:16). And then he says the false teachers exploit you “with stories they have made up” (2:3). So the true teacher sources what he says from the Bible. The false teacher relies on his own creativity. He makes up his own message.
Read the whole thing: 7 Traits of False Teachers – The Gospel Coalition Blog.