We are susceptible to heretical teachings because, in one form or another, they nurture and reflect the way that we would have it be, rather than the way God has provided, which is infinitely better for us. As they lead us into the blind alleys of self-indulgence and escape from life, heresies pander to the most unworthy tendencies of the human heart.
Commemoration of Ethelburga, Abbess of Barking, 675 What happens to someone who follows heretical teachings? It became quickly and readily apparent how cruel heretical teachings are and how prevalent the heresies are in contemporary times. Victims of these teachings have been encouraged to either to escape the world and their basic humanity into some form of flight and death or to use religion to undergird and isolate further their own self-centered self from the need to be loved and to love... The conviction that heresy is cruel has given me a growing awe of and respect for orthodoxy.