“Empty your mind, be formless… shapeless, like water. If you put water into a cup, it becomes the cup. You put water into a bottle; it becomes the bottle. You put it into a teapot; it becomes the teapot. Water can flow, or it can crash. Be water, my friend…”
This quote of Bruce Lee is one of my favorites. If you practise wing chun, you know exactly what he means. Do not use force to fight force, just be like water and flow your punch into the opponent.
Short verion of the interview.