我们学得越多，就越发现自己的无知。
The more we study the more we discover our ignorance.
解释：货卖完了才知道不足，是由于不懂得计量；事情结束了才知道有余，是由于不懂得调节。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
The best time to plant a tree was 20 years ago. The second best time is now.
我认为最好的关系是那些你可以完全做自己的关系。