世界是一本书，不旅行的人只读了一页。
The world is a book, and those who do not travel read only one page.
Doublethink means the power of holding two contradictory beliefs in one's mind simultaneously, and accepting both of them.
Stay hungry, stay foolish.
教育的根是苦的，但果实是甜的。
仇恨只会毁灭仇恨者。