He then printed a table made up of seven columns (one for each day of the week) and thirteen rows (one for each virtue), and he put a black spot in the appropriate square each time he failed to live a whole day in accordance with a particular virtue. He concentrated on only one virtue a week, hoping to keep its row clear of spots while paying no special attention to the other virtues, though he filled in their rows whenever violations occurred. Over thirteen weeks, he worked through the whole table. Then he repeated the process, finding that with repetition the table got less and less spotty.
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