William Peter Blatty. The exorcist (№ 49219)

The essence of obsession is not the wars, as some tend to believe, and not in the great events. She has a different scale, and it very rarely makes itself felt openly, rarely invades the soul, in flesh and blood. No, I've seen this obsession is in the details, in a meaningless, trivial quarrels, misunderstanding, in a rough and offensive words, sometimes breaking from the lips of close friends. And sometimes from the lips of the beloved. Well, we do not need to call Satan, to wage a war, we start it themselves...