如堕烟海

Explanation: Fall: fall. If the smoke out there in the vast boundless. Metaphor lost, can not find clue, grip essentials. 　　Usage: Verb-object type; as predicate, object, complement; metaphor lost 　　Source: Southern Song Liu Yiqing "Shi reward reputation": "Wang Zhongzu, Liu Yan Zhongjun made really long talk about actually all _set_ to go. Liu said that Lord said: 'Origin arguably!' Lord said: 'it is falling into the Qing clouds'. " 　　Examples: Thousands of learning at home and practice at home, do not understand this method, the result ~, can not find the center, it can not find the methods of resolving contradictions. (Mao Zedong's "On Contradiction")  Thesaurus:  Such as sitting cloud and mist