The more you know, the more you realize you don't know.
The past is always present, and the present is always past.
"Books are the bridges between generations."
人的喜怒哀乐的感情没有表现出来,叫做中;表现出来合乎法度,叫做和。达到中和,天地就各居自己的位置,万物也就生长了。