Historic heresies didn’t die or fade away. Each generation boasts its own. Even while these counterfeit teachings remain outside the accepted bounds of Christianity, modern-day versions plague churches.So how does a church leader or pastor understand and deal with these age-old controversies when they pop up in the congregation? In this book, Roger Olson describes the curses but also gifts that heresies bring the Church. While heresies can occasionally correct a version of orthodoxy, they are not simple confusions or misunderstandings about impenetrable mysteries of divine revelation. Instead they undermine the faith and are dangerous distortions. The author describes major heresies and how the church dealt with them, the players, and what pastors can do to address these faith issues in order to educate congregations about Jesus, God, and salvation. Also included are questions for individual or group study.