诗歌是表达不可言说之物的艺术。
Poetry is the art of saying the unsayable.
凡事需多听但少言；聆听他人之意见，但保留自己之判断。
马克思的功绩在于他忽然在社会思想史上产生了一个质的变化。他解释历史，理解其动力，预测未来，但除了预测之外，他还表达了一个革命性的概念：世界不仅必须被解释，还必须被改变。
When you work on hard problems long enough, you start to see connections where others see only confusion.
Sustainability is not an option, it's a responsibility.
The best way to predict the future is to create it.
