用管窥天

Explanation: The sky from the pipe. Metaphor of the narrow vision, experience short-sighted. 　　Source: "Zhuangzi Qiu water" is the direct use of Glimpse days, with a cone that way also, do not have a small peace! "Xuanying still sparse analogy to Glimpse days, Ju know days of narrow width." Thesaurus:  Yongguankuitian