Jesus spoke about the false teachers. Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Therefore by their fruits you will know them. (Matthew 7:15-20 NKJV) These teachers did not teach the truth. Similarly, Jeremiah 23:16 warned in his time, “Thus says the Lord of hosts: ‘Do not listen to the words of the prophets who prophesy to you. They make you worthless; They speak a vision of their own heart, Not from the mouth of the Lord.’” Jesus warned the people to be careful of the servants of the devil, who can look like servants of God; the apostle Paul identified this problem, too. “For such are false apostles, deceitful workers, transforming themselves into apostles of Christ. And no wonder! For Satan himself transforms himself into an angel of light. Therefore it is no great thing if his ministers also transform themselves into ministers of righteousness, whose end will be according to their works” (2 Corinthians 11:13-15). False teachers can be known by their fruits or their works and by the things they do and what they want