Poetry written with a Dark theme such as the poem The Man He Killed by Thomas Hardy is piece of literature written by the poet in meter or verse expressing various emotions which are expressed by the use of variety of techniques including metaphors, similes and onomatopoeia. The emphasis on the aesthetics of language and the use of techniques such as repetition, meter and rhyme are what are commonly used to distinguish Dark poetry from Dark prose. Poems often make heavy use of imagery and word association to quickly convey emotions. A famous example of Dark poetry is the poem The Man He Killed by Thomas Hardy.