Man is good by nature， society corrupts him.
Sustainability isn’t a trend—it’s a necessity for survival.
无知比知识更容易出现。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
Afghanistan is the land of my past, the place where I had laughed and cried, but it was no longer my home.
When you die you take absolutely nothing with you except your reputation.