Loneliness is the curse of nature to those who live in groups, and solitude is the only way out of loneliness.

有真才能的人不依恃才能，有真学问的人不夸耀学问。

Sustainability is not an add-on, it's a way of thinking.

【译文】 孔子说：“人无信誉，不知能干什么？就象大车没有车轴，小车没有车轴，怎么能启动？”