Quotes from book
Ji Xiao Xin Shu

Name: Ji Xiao Xin Shu
Author: Qi Jiguang

Qi Jiguang

The Jixiao Xinshu or New Treatise on Military Efficiency is a military manual written during the 1560s and 1580s by the Ming dynasty general Qi Jiguang. Its primary significance is in advocating for a combined arms approach to warfare using five types of infantry and two type of support. Qi Jiguang separated infantry into five separate categories: firearms, swordsmen, archers with fire arrows, ordinary archers, and spearmen. He split support crews into horse archers and artillery units. The Jixiao Xinshu is also one of the earliest extant Asian extant texts to address the relevance of martial arts to military training and warfare. Several contemporary martial arts styles of Qi's era are mentioned in the book, including the staff method of the Shaolin temple.

“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?"”

Qi Jiguang book Ji Xiao Xin Shu

Then you exert and test yourself for a while.
Source: Jixiao Xinshu (1560; 1584), Chapter 14: The Chapter on the Fist Canon and the Essentials of Nimbleness