真相很少纯粹，也绝不简单。
The truth is rarely pure and never simple.
"The world is full of stories, but the ones that matter most are the ones we tell ourselves."
You can't change your elephant by direct force, but you can train it over time.
数算练习告诉我们算术运算的原理，而不是单单的记忆和不断演算。
I need the sea because it teaches me.