给学生一些事情去做，而不是一些东西去学；而这些事情的性质需要思考；学习会自然而然地发生。
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.
The only limits that exist are the ones you place on yourself.
学习新编程语言的最好方法是用它编写程序。
过去是一面映照当下的镜子。