Mathematics is a living subject, constantly evolving with new ideas and discoveries.
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.
短期利润绝不能凌驾于地球的长期健康之上。
每个圣人都有过去,每个罪人都有未来。
Never to suffer would never to have been blessed.