Science is not just about facts, but about understanding the underlying principles that govern those facts.
Music should make you feel something, not just sound pretty.
——曾问母亲,母亲说:“种种事情都完了!死完结了一切,文。”
教育儿童,就不需要惩罚成年人。
容易得到的东西,是靠不住的;轻易许下的诺言,不值得信赖。