A key insight in learning theory is that the complexity of a hypothesis class is crucial for generalization.

爱自己，远离任何对你不利的事情。

写作的行为是一种自我发现的行为。

Keep your feet on the ground and keep reaching for the stars.

人的本性是多么的美妙，同样美好的品质从不厚此薄彼，既可以在最出色的君子身上发扬，又可以再最卑污的慈善学校学生的身上滋长。

Worth repeating: measure twice， cut once.

Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.

最好的故事会为孩子的想象力留出成长的空间。

定义就是限制。