If a man will begin with certainties， he shall end in doubts； but if he will be content to begin with doubts， he shall end in certainties.

史记

You cannot get through a single day without having an impact on the world around you. What you do makes a difference, and you have to decide what kind of difference you want to make.

解读：绝对的自由会让拥有更多资源、权力的强者肆意妄为，他们会凭借优势去压榨弱势群体，抢占利益。所以，用道德、法律来框定自由边界，是守护社会公平、保障弱者权益的必需。

概率论是我们处理不确定性的唯一工具。