Throughout two millennia of Christian history, the great heresies have tried to destroy the Faith by perverting the truths that Christ taught the apostles. Beginning in Jesus' own time with the betrayal of the arch-heretic Judas, and continuing through the centuries, waves of error have threatened to swamp the Church, only to break and be dashed upon the Rock of Peter. However, though they may be defeated for a time by saints, popes, councils,...