Why does taizong use a quote from confucius to support his argument? explain your answer in one or two sentences.

In the book ii ch 4 p88, confucius outlines a life devoted to learning and the pursuit of jen. it shows that attaining the status of the gentleman or superior man is a life long pursuit achieve only through a sincere devotion to self cultivation. is also demonstrates that if such devotion is carried out, one can follow his or her heart's desire without concern for moral quandaries.