Why do some people respect Nan as a master of Chinese studies, and some people think Nan is a liar of Chinese studies?

Heather is proficient in Confucianism, Buddhism and Taoism, and has been studying all his life. Heather is not only knowledgeable, but also pays attention to the cultivation of certificates, such as the cultivation of bone observation. There are generally three kinds of people who denigrate heather: first, they have not read much about more than 60 works of heather, and they have a little knowledge and taken them out of context. Second, the mind is not for fame and popularity. Third, a man of ordinary character, who belittles others and elevates himself, is immoral.