孔子说，真正的知识是知道自己无知的程度。亚里士多德和苏格拉底也说过同样的话。这是一种可以传授或学习的技能吗？也许可以，只要你对结果有足够的兴趣......

I think the most important thing in life is to love and be loved in return.

利润永远不应以海洋健康为代价。

The chess-board is the world; the pieces are the phenomena of the universe; the rules of the game are what we call the laws of Nature.  

释义：船装载过重就会沉没，人欲望太强就会损害生命。劝诫人要节制自己的欲望。