我知道要达到顶峰需要付出多少努力，但保持在那里需要更多。
I know how much work it takes to get to the top, but even more to stay there.
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。
The silliest woman can manage a clever man; but it needs a very clever woman to manage a fool.
To travel is to write, and to write is to travel.
"In the end, we will remember not the words of our enemies, but the silence of our friends."