Once you have acquired the skills, you must test them on an opponent, but in no way should you consider victory or submission to be a cause for shame or pride. Rather, you ought to think, "By what means did I defeat him?" Or, "By what means could have I defeated him?" Then you exert and test yourself for a while.
Chapter 14: The Chapter on the Fist Canon and the Essentials of Nimbleness - Jixiao Xinshu (1560; 1584)