How do you win a battle? You read the enemy’s book. Familiarity with his tactics, knowledge of his ways, is essential in waging a successful war. It’s true in military warfare. It’s true in spiritual warfare as well. Patton gained an immeasurable advantage by learning in advance of being attacked where, in all likelihood, Rommel would concentrate his strike. He studied Rommel’s personality, his strategy in previous battles, his philosophy of tank warfare, all with a view to anticipating and countering every conceivable move. Satan doesn’t have a book. But he’s in ours.