煤炭的真正成本不仅在于价格，还在于我们如何管理其后果。

Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

不进行哲学思考的生活，实际上就像闭着眼睛而不试图睁开它们。

当一个人开始长得像他的父亲时，他就知道自己正在变老。

Management is an art that requires continuous learning and practice.

The only real hope is the hope of the heart.