This Bruce Lee martial arts comparison comes from a documentary about his life I watched. He studied martial arts after making many films and becoming famous. He found time to study after he broke his back from lifting weights that were too heavy (he always pushed himself to the limit and beyond) . The doctors told him he may never walk again let along do martial arts. Bruce Lee refused to listen to them and used all his time to read books and study the martial arts history, culture, and the psychology behind them. He began therapy to walk again and rapidly recovered his full movement to the doctors surprise. And continued to work at it until he re-gained his previous strength and flexibility- and then went farther to surpass it and release even more martial arts films. It was sometime during this he was recorded in the documentary, saying that "one must flow like water".

                     John 7:38 "He who believes in Me, as the Scriptures say, 'From his innermost being shall flow rivers of Living Water.'" 

Martial arts should not have any steps like karate did and the best way to practice was full contact with pads (before then there was no contact in karate matches).  It was said his kick was like getting hit by a car, and the document revealed that he could hold his fist 1 inch away from a man and strike him- and cause the man to fall over due to the impact of Bruce Lee’s strength. I saw it, he didn’t push with his fist or anything, just a  quick impact sent a large man flying. Bruce Lee refused to let his injury stop him. He refused anything less than the best in himself performing martial arts. That’s the rest of what I know about him. A great example for a spiritual analogy of what we should aim for.
 

                James 4:7 "Submit, therefore to God. Resist the devil and he will flee from you."
                Eph. 6:13 "Take up the full armor of God, that you may be able to resist in the evil day, and having done everything... to stand firm"