at the age of 40
2021-05-24 16:37:15 from：
in 512 b.c.（the 30th year of zhaogong，duke of the state of lu），confucius was in the state of lu.he called himself"a man who was clear-minded at the age of 40".（the analects·weizheng）.to be clear-minded refers to the established outlook on life and the world of a man of accomplishment.
edit：卢娜娜
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