Closed minds are seldom willing to venture out of the 'comfort zone'. Open minds become uneasy with complacency and seek out challenge. Open minds tend to face reality as it is and as it can be. Closed minds tend to 'filter' reality to make it fit into their past 'realities'. Open minds look for intellectual stimulation and consider more options.
Closed minds seek the tried and true.
Open minds look for potential, improvement and opportunity. Closed minds restrict potential and opportunity and conform to habit and precedent. The closed mind produces fewer successes. Open minds view failures as stepping stones to future success. Each of us fits somewhere inside the extremes.