False Teachers - Known by Their Fruit

The sermon opens with an illustration about counterfeit paintings sold on the streets of Saigon to show that deception permeates everyday life — from gold and diamonds to food and credentials — and that this deception has also crept into the church through false pastors, teachers, and even false believers. The pastor cites Jesus's warning in Matthew 7:15 that false prophets will certainly come, appearing as gentle sheep but inwardly being ravenous wolves.

The central section of the sermon analyzes how to recognize false teachers. They do not teach complete falsehoods but rather partial truths, omitting difficult subjects such as holiness, repentance, church discipline, and the suffering that accompanies following Christ. They favor pleasing, ear-tickling messages about blessings, love, and prosperity while ignoring God's justice and judgment. The sermon also warns that false teachers seek to divide the church by flattering and coaxing believers to follow them without any concern for the flock, consistent with Paul's warning in Acts 20:28-30 and Peter's in 2 Peter 2:1-3.

The pastor explains the image of "knowing a tree by its fruit," which Jesus repeats twice in Matthew 7. Fruit does not appear overnight but accumulates over a long period — just as the mangosteen tree takes eight to ten years to bear fruit. Therefore, the congregation must observe the character, ethics, and daily conduct of those who teach God's Word over time, not only during Sunday services.

The sermon applies this teaching practically by pointing to the fruit of the Spirit in Galatians 5:22-23 as the standard by which teachers of God's Word should be evaluated. This teaching is not a license to nitpick or persecute pastors, but rather a call for every believer to know Scripture deeply in order to guard themselves against false doctrine. The pastor commits to standing firm against anyone who infiltrates the congregation to lure believers away from the truth of God's Word.