What does the Bible say about counterfeit teaching?

The Scriptures are abundant with warnings about counterfeit teachings and false prophets that deceive believers. In Matthew 24, Jesus instructs His disciples to 'take heed that no man deceive you,' highlighting the reality that there will be many who come in His name but teach a distorted gospel. Paul also affirms this in 2 Corinthians 11:13-15, where he discusses false apostles who masquerade as ministers of righteousness. The clear message throughout the New Testament is a call for believers to remain vigilant and discerning, relying on the truth of God's Word to identify falsehood.