《汉书·传·东方朔传》
俗语说： 用竹管看天，用瓢来量海，用草杆撞钟，这样做怎么能够通晓星象，考究海情，发出声响呢？
语曰 以管窥天，以蠡测海，以莛撞钟 ，岂能通其条贯，考其文理，发其音声哉！
As the proverb says: Looking at the sky through a bamboo tube, measuring the sea with a gourd, striking a bell with a straw – how can such actions make one understand the stars, investigate the nature of the sea, or produce a sound? 