Plato contrasted mimesis, or imitation, with diegesis, or narrative. He distinguishes between narration or report (diegesis) and imitation or representation (mimesis). Realism in this sense is also called naturalism, mimesis or illusionism. He distinguishes between narration or report ("diegesis") and imitation or representation ("mimesis"). "Poetics" is his treatise on the subject of mimesis. This is related to Lessing's turn from French classicism to Aristotelian mimesis, discussed above. A common classical idea of beautiful art involves the word mimesis, the imitation of nature. Art as mimesis has deep roots in the philosophy of Aristotle. Literature, in general, is defined by Aristotle as a mimesis, or imitation of life. Variations of Plato's reasoning on mimesis re-emerged. Tragedy is the truest mimesis, followed by epic poetry, comedy, and lyric poetry. The specific terms masquerade and mimesis are sometimes used when the models are inanimate. The Greeks referred to the reliance on visual observation as mimesis. This is not the concept of mimesis as found in Western philosophy. Officially, the represents both and , but the latter occurs only in borrowings and mimesis.