A man is like a fraction whose numerator is what he is and whose denominator is what he thinks of himself. The larger the denominator, the smaller the fraction.

The only way to have a good day is to start it with a positive attitude.

写作是一种不被中断的说话方式。

科学是一项集体事业，每一代人都为之添砖加瓦。

Children are the most honest critics; they will tell you exactly what they think.

I think it's important to keep challenging yourself, to keep growing.