面壁磨砖

Explanation: Metaphors do not succeed. 　　Source: "Huai Nan Yue Jingde Chuandeng Jackson recorded": "Kaiyuan Road live in Salmonella pass court, often on meditation ... ... division is taken a brick, stone mill they arise Anqian. One said: 'Teachers do?" The master said: 'grinding for mirror' one said: 'How can grind brick into a mirror evil?' (master said): 'as a Buddhist meditation Qide evil?' " 　　Examples: Although the passive attitude of those who is not, ~ also of the ancients commonplace. ★ Song Chen Shih said, "Please stay on the elders and then Jianfu sparse"