Effort within the mind further limits the mind, because effort implies struggle towards a goal and when you have a goal, a purpose, an end in view, you have placed a limit on the mind.

The man was described by Jesse Glover as a karate man who also had a blackbelt in judo though Glover who was a brown belt in judo at the time claimed to be better than the man in judo. The same year he also choreographed fight scenes for The Wrecking Crew starring Dean Martin Sharon Tate and featuring Chuck Norris in his first role. Photo shoot costume tests were also organized for some of these planned film projects.

He initially trained in Wing Chun but later rejected well-defined martial art styles favouring instead the use of techniques from various sources in the spirit of his personal martial arts philosophy which he dubbed Jeet Kune Do (The Way of the Intercepting Fist). Lee moved to the United States at the age of 18 to receive his higher education and it was during this time that he began teaching martial arts.