How can we distinguish between truth and lies in theology?

John's exhortation in 1 John 2 emphasizes the need for discernment among believers when it comes to theological teachings. He stresses that knowing the truth is vital to countering the lies propagated by Antichrists. Believers are responsible for testing all teachings against the Scriptures, as true discernment only comes from the knowledge of the doctrine revealed in God's Word. This equips Christians to reject heretical views and to root themselves firmly in the truth of the gospel, ensuring they do not become deceived by false narratives that deviate from biblical truth.