幸福取决于我们自己。
A mathematician is a device for turning coffee into theorems.
不要为那些不愿在你身上花费时间的人而浪费你的时间。
"I’m a very positive thinker, and I think that is what helps me the most in difficult moments."
Success is not final, failure is not fatal: it is the courage to continue that counts.
The greatest works are those that are still being read long after their authors have died.