"The only thing we can be sure of about the future is that it will be different."
"We are all searching for something, and sometimes, what we find is not what we expected."
凡是圣人制造的这些东西，无一不是有益于实用才去做的，所以使用财物不浪费，民众能够不劳苦，他兴起的利益太多了。