Why should Christians be concerned about false prophets?

Christ warned about false prophets in Matthew 7:15-20, stating that they come in sheep's clothing but are inwardly ravenous wolves. They preach a distorted message that often emphasizes human effort over divine grace, leading to spiritual deception and even destruction. Christians must be vigilant and discerning, understanding that true preachers of the gospel point to Christ and His righteousness, not to their own works or moralism. The fruits of their ministry—converts who genuinely believe in the true gospel—are crucial in assessing a preacher’s authenticity.