-11 The sermon examines the biblical definition of a heretic as one who promotes divisive and contentious behavior contrary to core Christian doctrines. It emphasizes that while minor differences in conviction are acceptable, rejecting fundamental truths like salvation by grace or the deity of Christ constitutes heresy. The preacher outlines a process for handling such individuals, which involves initial admonition followed by rejection if they refuse correction. Drawing from Titus 3 and Matthew 18, the message warns against engaging in unprofitable arguments and stresses the importance of maintaining sound doctrine within the church community.