Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.
Always plan for the worst-case scenario.
大自然希望儿童在成人以前就要像儿童的样子。
一个社会离真相越远,它就越会憎恨那些说出真相的人。
The best art is the art that stays with you.