工欲善其事，必先利其器

Explanation: To do a good job, first to make tools sharp. Analogy to do something, preparation is very important. 　　Usage: Complex sentence; for clause; analogy to do something, preparation is very important 　　Source: Pre-Qin Confucian "Analects Duke Ling of Wei": "Sharp tools make good his tools. Home is state also, do the doctor of Sage, Friends of Chevalier of the benevolent." 　　Examples: "~." Jinji nothing, even if Yu rebirth, this sort should know what. (Qing Li Ru-zhen, "Flowers in the Mirror," the 36th back)