心智就是大脑的运作。
The mind is what the brain does.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
Every building is a prototype. No two are alike.
教师必须既是学生的研究者，也是学科的研究者。
后世的君主却不是这样，认为天下的利害大权都出于自己。