读书的时候不要只想作者怎么看，想想你自己怎么看。
When you read,don't just consider what the author thinks,consider what you think.
Nothing is more powerful than will, and nothing is more important than determination.
True progress measures both economic growth and ecosystem health.
数学是一项协作的努力。没有人可以单独完成。
你无法控制你无法衡量的东西。
I don't know anyone who needs a hug more than I do.
If you’re not failing occasionally, you’re not pushing the boundaries enough.