What does the Bible say about the consequences of rejecting sound doctrine?

The Bible teaches that rejecting sound doctrine has dire consequences for individuals and congregations alike. In 2 Thessalonians 2:10-12, Paul highlights that those who do not love the truth may be given a strong delusion, leading them to believe a lie. This underscores the seriousness of adhering to sound doctrine, as those who turn away from it risk spiritual blindness and are confronted with the ultimate outcome of being separated from the truth and from Christ Himself. Thus, the necessity of loving sound doctrine cannot be overstated.