出自晋·葛洪《抱朴子·博喻》。用美玉做成的船和桨，不能用于水上航行;用黄金做弓，玉石做弦，仍没有射箭的功能。（笔杆子 rendoc.com）
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
如果你还在想着昨天，你就不会有更好的明天。
Freedom is not the power to do what we want， but the right to do what we ought.
The most important skill for a programmer is the ability to read code.
The best way to predict the future is to invent it.