The purpose of Zen is sudden enlightenment. For this purpose, the masters adopted educational methods designed to eliminate all the obstacles of the mind: wrong thinking and attachment to the things of the world.

This book presents a summary of the various methods of all the schools of Zen. It also includes brief biographies of the founders of the five schools, as well as the essence of the teachings they presented when transmitting the quintessence of Zen they had understood.

The author Liu Kuan Yu was a student of Zen masters, and in his various works, he presents the methods of Zen Buddhism in an accessible way, providing ample explanatory comments that help the reader delve into the profound wisdom and insight of the Chinese masters.