There are people with excellent history failing miserably around us. This is not because of their weak performance, it is only because of their reluctance to keep themselves updated with the latest developments and changes in their sphere of operation. This makes them that much more incompetent and allows others to over take them. Like you day after day keep eating food to keep your body healthy and energetic, you need to feed your knowledge requirements also on a regular basis, at least every month, if not daily.