One often hears of a horse that shivers with terror, or a dog that howls at something a man's eyes cannot see, and men who live primitive lives where… - William Butler Yeats

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One often hears of a horse that shivers with terror, or a dog that howls at something a man's eyes cannot see, and men who live primitive lives where instinct does the work of reason are fully conscious of many things that we cannot perceive at all. As life becomes more orderly, more deliberate, the supernatural world sinks farther away.