Literature (from Latin litteraetantri (plural); letter) is the art of written works, and is not bound to published sources (although, under circumstances unpublished sources can be exempt). Literally translated, the word literature means "acquaintance with letters" (as in the "arts and letters"). The two major classification of literature are poetry and prose.
"Literature" is sometimes differentiated from popular and ephemeral classes of writing. Terms such as "literary fiction" and "literary merit" are used to distinguish individual works as art-literature rather than vernacular writing, and some critics exclude works from being "literary", for example, on grounds of weak or faulty style, use of slang, poor characterization and shallow or contrived construction. Others exclude all genres such as romance, crime and mystery, science fiction, horror and fantasy. Pop lyrics, which are not technically a written medium at all, have also been drawn into this controversy.
A poem is a composition written in verse (although verse has been equally used for epic and dramatic fiction). Poems rely heavily on imagery, precise word choice, and metaphor; they may take the form of measures consisting of patterns of stresses (metric feet) or of patterns of different-length syllables (as in classical prosody); and they may or may not utilize rhyme. Relaxation Through Poetry is a tool used to help someone relax in times of stress. One cannot readily characterize poetry precisely. Typically though, poetry as a form of literature makes some significant use of the formal properties of the words it uses – the properties of the written or spoken form of the words, independent of their meaning. Meter depends on syllables and on rhythms of speech; rhyme and alliteration depend on the sounds of words.
Arguably, poetry pre-dates other forms of literature. Early examples include the Sumerian Epic of Gilgamesh (dated from around 2700 B.C.), parts of the Bible, the