A belief is like a guillotine, just as heavy, just as light.
成功不是终点，失败也不是致命的：重要的是继续前进的勇气。
You have to believe in yourself when no one else does.
成功的关键是专注于目标，而不是障碍。
Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."
