The local church has an important duty as the signaler of truth in the New Testament age, assigned by God to preach the accurate gospel and doctrines so that people can be saved. However, Satan constantly tries to disturb churches and cause them to broadcast wrong or blurred signals by confusing them about the relationship between doctrine and love, mixing Christianity with other religions, and promoting false doctrines. It is crucial for churches to focus on rightly understanding and teaching biblical doctrines, as this is what differentiates true Christianity from false religions and is the means by which people can have the certainty of salvation.