Know your major defect.
Every talent is balanced by a fault, and if you give into it, it will govern you like a tyrant. You can begin to overthrow it by paying heed to it: begin to conquer it by identifying it. Pay it the same attention as those who reproach you for it. To master yourself, you must reflect upon yourself. Once this imperfection has surrendered, all others will follow -- Baltasar Gracian