The most profound ideas in mathematics often come from asking the simplest questions.
Success is not final,failure is not fatel,it is the courage to continue that connts.
当我们爱的时候,我们总是努力变得比现在更好。
人生重要的事情是确定一个伟大的目标,并决心实现它。
The most important thing is to keep thinking, keep questioning.