The young do not know enough to be prudent, and therefore they attempt the impossible, and achieve it, generation after generation.
The most sustainable mines are those that think beyond extraction.
《诗经》上说“必须选择所使用的染料,必须谨慎地来浸染”,就是这个意思。 
希望是一幅美好的早餐,但却是一顿糟糕的晚餐。