The teacher must be a student of the child as well as of the subject.
教师必须既是学生的研究者,也是学科的研究者。
人生是由小小的幸福积累而成的。
我不会让世界偷走我的快乐。
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.