What you have been taught by listening to others' words you will forget very quickly; what you have learned with your whole body you will remember for the rest of your life.
Gichin FunakoshiAny man will be able, after sufficient practice, to accomplish remarkable feats of strength, but he may go only so far and no farther. There is a limit to human physical strength that no one can exceed.
Gichin Funakoshi