John Wesley warns against the dangers of bigotry in the church, emphasizing that true followers of Christ should not forbid others who perform good works in His name, even if they do not belong to the same group or share the same beliefs. He reflects on the tendency to judge others based on their affiliations or differences in doctrine, urging believers to recognize the work of God in all who cast out devils, regardless of their background. Wesley concludes that to act in a bigoted manner is to oppose God's work and encourages a spirit of unity and acceptance among Christians.