Both the Law and Gospel are necessary in Christian preaching and for living the Christian life.
Although Prince teaches a form of the biblical gospel, this is the very thing that makes him so dangerous, using the gospel as the bait on the hook.
The Gospel. The Greek word εὐαγγέλιον, evangelion, means “good news” or “a good message,” and occurs 77 times in the New Testament. Yet, what is “the news” or “message” that Christians are exhorted to herald? (Mark 16:15; Acts 16:10; Romans 1:15; 10:15; 15:20).