there is one word that Waitzkin feels needs to be eliminated from the educator's vocabulary: perfection. "Perfection is the most dangerous word in the learning process and I hear people use it all the time, "you played perfectly," or "you did this perfectly". Perfection is devastating, it doesn't exist. Creativity comes out of imperfection. All of the most beautiful creations are born out of something going wrong and you just roll with it and you come up with something beautiful. That's what inspiration is all about." qouted from Josh Waitzkin.
apart from just quoting Waitzkin I think he is right but there is nothing wrong with pushing yourself.
the idea here is that whatever we do we should always strive for perfection,lessons are learned along the way and thats a mistake that must not recur so we should strive for perfection not just learning in whatever we do.,but by perfecting practicing learning to make perfect. to reach another level is difficult especially in chess where others have already excel and have done their study ahead of us.,but when they stop perfecting their knowledge others may reach them and finally overcome them.