最优雅的数学证明是那些以简单揭示真理的证明。
The most elegant mathematical proofs are those that reveal truth with simplicity.
I am living a dream I never want to wake up from.
The talent for being happy is appreciating and liking what you have, instead of what you don't have.
要快乐,既需要忘记,也需要记住。
穷人需要的不是施舍,而是阶梯。
The world is full of signs, but we have forgotten how to read them.