Success is not final, failure is not fatal: It is the courage to continue that counts.

You know — one loves the sunset， when one is so sad.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

意志不是一种特殊的能力，而是心灵的一般功能。

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

聪明的投资者是现实主义者，他们向乐观主义者出售，从悲观主义者那里购买。