What does the Bible say about false doctrine?

The Bible consistently warns against false doctrine, highlighting its corrupting influence. In Mark 8:14-21, Jesus cautions His disciples to beware of the leaven of the Pharisees and Herod, illustrating that even a small amount of false teaching can lead to significant spiritual harm. False doctrine is not merely a misunderstanding of Scripture; it actively misleads individuals both in their relationship with God and in their understanding of man’s nature. Specifically, any religious teaching that deviates from Christ alone as the source of righteousness is identified as sin against God and harmful to man, as it could lead souls astray.