内容简介：
In the words of one reviewer: "This book touches on everything someone should know, but few actually do, by the time they reach black belt." This book is not specific to a single system of martial arts. It is a look at, as the title implies, some of the principles that underlie martial arts in general. The author discusses his personal perspective on martial arts training and some common pitfalls he has seen in his 25 years of training. Forward by Joe R. Lansdale