“Such people are false apostles and dishonest workers who disguise themselves as apostles of Christ. And no wonder! Even Satan disguises himself as an angel of light. It is no great surprise then that his servants also disguise themselves as servants of righteousness……” II Cor. 11:13-15 CEB
The Apostle Paul warned speaking about men who wanted the Corinthian Christians to return to believing and observing a type of Judaism in their Christian walk. (II Cor. 11:13-15)
This passage in II Cor. 11 shows that these false teachers are normally those who look righteous and good in appearance. They even appear as “ministers of righteousness” by teaching messages that are socially and religiously acceptable to most ordinary people.
Remember that Jesus Himself also taught that at the end of the age, many people would arise who would be saying that Jesus was indeed the Messiah, but even though they did this, they would be great deceivers.
Jesus told His disciples in Matt 24: 4-5, “….take heed that no man deceive you. For many shall come in my name, saying, ‘I am the Christ; and shall deceive many.’”
He went on to warn us about false prophets who state they are followers of Christ and claim to be advocating the basic principles of Christianity.
“Not everyone who calls me their Lord will get into the kingdom of heaven. Only the ones who obey my Father in heaven will get in. On the day of judgment many will call me their Lord. They will say, "We preached in your name, and in your name we forced out demons and worked many miracles." But I will tell them, "I will have nothing to do with you! Get out of my sight, you evil people!"” Matt. 7:21-23 CEV