The PAC learning framework provides a formal way to quantify the learnability of a concept class.

The only thing that can make you free is your own mind.

When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.

我们不是七个人，我们是一体的。

我不过是时间记忆中的一道伤口。

孩子越能够专心，就越能从工作中得到平静，就越能发自内心地纪律或规则。