The concept of probably approximately correct (PAC) learning has been foundational in computational learning theory.

To remember is to fight against disappearance.

A true writer always stands in opposition to power.

不要归罪于天地陰陽的变化，一切都应责怪人事；不要对圣人抱有过高的奢望，一切都应求诸自身。

天真之人的信任是说谎者最有用的工具。