No one is free, even the birds are chained to the sky.

译文：是男人就该绝境求生，怎么能坐着等死?

群树如表示大地的愿望似的，踮起脚来向天空窥望。

To me programming is more than an important practical art. It is also a gigantic undertaking in the foundations of knowledge.

Education is the foundation of conservation—people protect what they understand.

人心在任何年龄都只会向同样敞开的心敞开。

君子做学问，是为了完善自己；小人做学问，是为了哗众取宠。