The only way to keep the small folk loyal is to make sure they fear you more than they fear your enemies. 
The city is a school, and its buildings are the teachers.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
任何成功企业的基础都是信任——员工、客户和利益相关者之间的信任。
You want to be extra rigorous about making the best possible thing you can.