What most often weighs you down and brings you misery is the past, in the form of unnecessary attachments, repetitions of tired formulas, and the memory of old victories and defeats. You must consciously wage war against the past and force yourself to react to the present moment. Be ruthless on yourself; do not repeat the same tired methods. Sometimes you must force yourself to strike out in new directions, even if they involve risk. What you may lose in comfort and security, you will gain in surprise, making it harder for your enemies to tell what you will do. Wage guerrilla war on your mind,
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