 An often cited metaphor for naturalness is pu ( simplified Chinese : 朴 ; traditional Chinese : 樸 ; pinyin : pǔ , pú ; Wade – Giles : p 'u ; lit . " uncut wood " ) , the " uncarved block " , which represents the " original nature ... prior to the imprint of culture " of an individual . It is usually referred to as a state one returns to . 
