The Creation discipline covers any activity that studies the self in order to manifest the material. Literature is a body of written works related by subject-matter, by language or place of origin, or by dominant cultural standards. Literally translated, the word means "acquaintance with letters" (from Latin littera letter). An emotion is a mental and physiological state associated with a wide variety of feelings, thoughts, and behaviors. It is a prime determinant of the sense of subjective well-being and appears to play a central role in many human activities. As a result of this generality, the subject has been explored in many, if not all of the human sciences and art forms. There is much controversy concerning how emotions are defined and classified. Lyrics can be expressed in literature as Poems or spoken in Music.