The world is a book, and those who do not travel read only one page.
The border is not a line but a wound.
你无法改变周围的人，但你可以选择与谁为伍。
You have to be willing to fail, to be wrong, to start over again with lessons learned.
数学家研究纯数学不是因为它有用；他研究它是因为他喜欢它，他喜欢它是因为它美丽。