Heresy and schism in the later Roman empire

Few Paris theologians like Beda’s bitterness. How can you win if you drive those who disagree with Luther into his camp? Hatred like this made Arius a heresiarch, drove Tertullian out of the Church. This is the way to make heretics.’ So Erasmus, and elsewhere he reflects how he exposed himself to the charge of heresy by trying to be just to heretics. He was kinder than Tertullian who had no mercy for them. Heresy is the devil’s work, one of the manifold ways he attacks truth. It is evil, it is sin; it is worse than schism, it is blasphemy, a kind of adultery, close to idolatry. Heresy brings eternal death, while persecution at least gives birth to martyrs. Heretics are the ravening wolves who attack Christ’s flock. Humanly considered, heresy is a sin of the flesh for, as an act of choice, it is self-assertion against God, and so the heretic is self-condemned. More properly it is demonic, the spiritual wickednesses from which it comes were sent by the devil.