Why it matters
A sermon is more than a speech. People listen believing that their pastor or teacher has prayerfully studied the passage and is offering their own honest ministry of God's Word. When someone copies another sermon, especially word for word, and gives no credit, that trust is damaged.
Scripture does not use the modern word plagiarism, but it speaks clearly about integrity. Paul tells believers to provide things that are honest in the sight of all people (Romans 12:17). He also describes his own ministry as refusing hidden or dishonest practices and handling God's word openly (2 Corinthians 4:2). Those principles apply to preparation in the study as much as to conduct in public.
But have renounced the hidden things of dishonesty, not walking in craftiness, nor handling the word of God deceitfully; but by manifestation of the truth commending ourselves to every man's conscience in the sight of God.
Learning from others is not the problem
No preacher starts from nothing. Pastors learn from Scripture teachers, books, conversations, study Bibles, church history, and one another. Paul expected Timothy to pass on what he had received to faithful people who could teach others too (2 Timothy 2:2). Receiving wisdom and sharing it is part of Christian discipleship.
The problem comes when a borrowed structure, distinctive illustration, research, or whole manuscript is presented as original work. A preacher can say that an insight came from a book, a commentator, or another pastor. Sometimes a brief verbal acknowledgement is enough. In other settings, such as published notes or online sermons, clear written credit may be wiser. Honesty does not make a sermon weaker. It gives it weight.
God cares about truthful words
Jeremiah confronted prophets who claimed divine authority for messages God had not given them. He even spoke of prophets taking words from one another and treating them as the Lord's message (Jeremiah 23:30). That setting is not identical to a pastor borrowing an outline today, but it shows why claiming an authority or originality that is not yours is spiritually serious.
Preaching should point beyond the preacher to Christ and to the Scriptures. John the Baptist had a healthy perspective: what a person receives is given from heaven, and Christ must increase while the servant decreases (John 3:27, John 3:30). Giving credit can be a small but real way of practising that humility.
Therefore, behold, I am against the prophets, saith the Lord, that steal my words every one from his neighbour.
What should happen when it is discovered
The right response is neither denial nor public cruelty. If a leader has plagiarised, they should acknowledge it plainly, apologise to those affected, correct any misleading claims, and take practical steps to change their preparation habits. Depending on the extent and pattern, church elders or denominational leaders may need to offer accountability, guidance, and a period away from preaching.
Church members can raise a concern carefully rather than spreading it as gossip. Jesus teaches a path that begins by speaking privately when possible, then seeks wise help if the matter cannot be resolved (Matthew 18:15-16). Serious, repeated deception needs real accountability. Yet repentance and restoration remain Christian hopes, not excuses to ignore harm.
If you preach or teach, use other people's work gratefully but transparently. Read the biblical passage for yourself, pray over it, test what you have learned, and name your sources when their contribution is substantial. The goal is not impressive originality. It is faithful, truthful service.
Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.