A mathematician is a device for turning coffee into theorems.
有时候最难的事情和最正确的事情是同一件事。
The foundation of national morality must be laid in private families.
统治阶级掌握着物质生产的手段;无产阶级仅有的是他们的劳动力。
80% of life's most defining moments take place by age 35.