历史学家是一个向后看的先知。
The historian is a prophet looking backwards.
In heaven， all the interesting people are missing.
It is better to be a human being dissatisfied than a pig satisfied； better to be Socrates dissatisfied than a fool satisfied.
Architecture begins where engineering ends.
The elements of consciousness are to be discovered by careful analysis.
农业中最大的风险是世界在变化，而我们却停滞不前。
没有大胆的猜想，就没有伟大的发现。