成功不是终点，失败也非致命，重要的是继续前进的勇气。
Success is not final, failure is not fatal: it is the courage to continue that counts.
对未来的真正慷慨在于把一切都给予现在。
La literatura no es más que un sueño dirigido.
It is error only, and not truth, that shrinks from inquiry.
The best mathematicians are those who are not afraid to take risks.