我们利用现有的东西，因为它们有价值
译文：凡事从自身上找原因，就不会有抱怨了。这就是孟子说的行有不得反求诸己。
The joy of discovery is not in the recognition but in the knowledge that you’ve contributed something meaningful.
历史不是机械的，因为人们有自由去改变它。
You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions.
No one is free, even the birds are chained to the sky.