The habit of dissolving his customary egoistic regard for himself is well worth cultivating repeatedly for a period. For several reasons it is good to learn this art of detachment, to practise becoming a second and separate person, to watch himself and note the different reactions to the day's events. During this exercise, he should place his attention upon some decisive event from his past which meant much to him at the time. He is to consider it as impartially and coolly as if it had happened to another man. He must keep out personal emotion from this special survey as he analyses the whole happening from beginning to end, from causes to results. He is to judge it critically and where he finds his former attitude or acts faulty, reshape it or them mentally to the correct form.
-- Notebooks Category 4: Elementary Meditation > Chapter 4: Meditative Thinking > # 163