《资治通鉴·后汉纪·后汉纪二》
仁用以团结大众，信用以执行命令，刑用以惩罚奸佞，失掉这三者，凭什么守卫国家！
仁以合众，信以行令，刑以惩奸，失此三者，何以守国！
Ruthlessness is used to consolidate the people, trustworthiness is used to enforce orders, law is used to punish villains; without these three means, how could one possibly guard the country!