Why is distinguishing false religion important for Christians?

The importance of distinguishing true Christianity from false religion is rooted in the biblical warning against deception. In Matthew 7:15, Jesus cautions His followers to beware of false prophets who appear as sheep but are ravenous wolves. The Apostle John also emphasizes in 1 John 4:1 that believers should test the spirits to determine if they are from God, as many false teachers have emerged. Understanding the truth protects the church from heresies that dilute the gospel and leads believers to rest in the sufficiency of Christ alone for salvation, rather than being misled by counterfeit teachings that promote salvation by works or personal merit.