Art of Learning by Josh Waitzkin pg 108

I have long believed that if a student of virtually any discipline could avoid ever repeating the same mistake twice - both technical and psychological - he or she would skyrocket to the top of their field. Of course such a feat is impossible - we are bound to repeat thematic errors, if only because many themes are elusive and difficult to pinpoint. For example, in my chess career I didn't realize I was faltering in transitional moments until many months of study brought the pattern to light. So the aim is to minimize repetition as much as possible, by having an eye for consistent psychological and technical themes of error.