"I see everything. That is my problem."

富贵荣华如同眼前短暂绽放的花朵，何必为此自寻烦恼。

代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。

化学和物理的界面是奇迹发生的地方。

Certification is not the destination; it's the starting point of responsible forestry.

I never think about the past. I always look forward to the next challenge.