飞蓬生长在麻地里,不用扶持也能挺立;白沙混进黑色泥土,也会跟着一起变黑。
教育的艺术必须从教育的科学中衍生出其规则。
I think it's important to be able to not take yourself too seriously.
Is there such a thing as a cheerful pessimist? That's what I am.