" A poisonous pedagogy is a toxic method of teaching or raising a child. It is a method which controls the behavior of the child by the misuse of Power Over the child. This misuse of power causes the child extreme pain. If the child becomes an adult without having worked through the hurt and pain of the experience, he will perpetuate the misuse of power in adulthood. Consequently, the adult can become toxic or poisonous to others. This toxicity is what we find in abusive relationships. "

― Patricia Evans , The Verbally Abusive Relationship: How to Recognize It and How to Respond