我们都是自己生活的作者，但我们也是别人故事中的角色。
"We are all the authors of our own lives, but we are also the characters in someone else's story."
"We are all in the gutter, but some of us are looking at the stars."
数学的本质不是使简单的事物复杂化，而是使复杂的事物简单化。