If you put limits to what you can achieve, you might as well be dead! Seriously if you always put limits on what you do, physical or anything else, it'll spread over into the rest of your life. It'll spread into your work, into your morality, into your entire being. There are no limits! There are plateaus, but you must not stay there. You must go beyond them. If it kills you, it kills you. A man must constantly exceed his level. Low aim is the biggest crime a man can commit. Remember, Life is a journey, not a destination.