Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.

道的根本来源于天，如果天不改变，道也不会改变

爱是一切问题的答案。

我总是寻找市场不喜欢的股票。

"Books are the bridges that connect us to the unknown."

写作是为我们内心深处的思想发声的一种方式。