"Literature adds to reality it does not simply describe it. It enriches the necessary competencies that daily life requires and provides; and in this respect, it irrigated the deserts that our lives have already become. " (C.S. Lewis)
Literature appeals to the most basic of human senses, observation, regardless how it's delivered. this in turn has an internal affect, perhaps an emotional attachment, recollected memory surfaces, and/or close emotional bond with what is being visually observed. The purpose of literature is utilized for its powerful ability to visual influence human experience/s.