“When the poet tells us that his love is like a red rose, we know by the very fact that he puts this statement in metre that we are not supposed to ask whether he actually had a lover, who for some bizarre reason seemed to him to resemble a rose. He is telling us something about women and love in general. Literature, then, we might say, is ‘non-pragmatic’ discourse: unlike biology textbooks and notes to the milkman it serves no immediate practical purpose, but is to be taken as referring to a general state of affairs. Sometimes, though not always, it may employ peculiar language as though to make this fact obvious — to signal that what is at stake is a way of talking about a woman, rather than any particular real-life woman. This focusing on the way of talking, rather than on the reality of what is talked about, is sometimes taken to indicate that we mean by literature a kind of self-referential language, a language which talks about itself.”
— Terry Eagleton, “Introduction: What is Literature?,” Literary Theory: An Introduction