The more relaxed the muscles are, the more energy can flow through the body. Using muscular tensions to try to 'do' the punch or attempting to use brute force to knock someone over will only work to opposite effect.
Bruce LeeIn building a statue, a sculptor doesn't keep adding clay to his subject. Actually, he keeps chiseling away at the nonessentials until the truth of his creation is revealed without obstruction.
Bruce LeeWhile it may come as a profound surprise to those of us who are in the throes of an emotional or life crisis, the fact remains that the answer to virtually all of our problems resides within us already. It exist in the form of a vast reservoir of free-flowing energy that, when channeled to our muscles, can give us great strength and, when channeled to our brain, can give us great insight and understanding.
Bruce Lee