你无法回到过去改变开头，但可以从现在开始改变结局。
You can't go back and change the beginning, but you can start where you are and change the ending.
The joy of discovery is what drives mathematicians forward.
法律的目的不是废除或限制，而是维护和扩大自由。
"We are all just trying to do our best in a world that doesn't always make sense."
Without freedom, there is no creation, and without creation, there is no true life.