Evil (ignorance) is like a shadow. It has no real substance of its own, it is simply a lack of light. You cannot cause a shadow to disappear by trying to fight it, stamp on it, by railing against it, or any other form of emotional or physical resistance. In order to cause a shadow to disappear, you must shine light on it.
Resistance to something was the law of New England nature; the boy looked out on the world with the instinct of resistance; numberless generations his predecessors had viewed the world chiefly as a thing to be reformed, filled with evil forces to be abolished, and they saw no reason to suppose that they had wholly succeeded in the abolition; the duty was unchanged. That duty implied not only resistance to evil, but hatred of it. Boys naturally look on all force as an enemy, and generally find it so, but the New Englander, whether boy or man, in his long struggle with a stingy or hostile universe, had learned also to love the pleasure of hating. Politics, as a practice, whatever its professions, had always been the systematic organization of hatreds.