Abstraction allows for a kind of freedom that representation sometimes doesn't.
Speech is the shadow of action; action is the manifestation of speech.
The purpose of education is not to fill the minds of students with facts but to teach them to think.
教育的目的不是用事实填满学生的头脑,而是教会他们思考。
The key to trading success is to have a clear plan and stick to it.