《北史·列传·卷五十一》
如果放弃道德，一味凭借险要自固，原来与你同舟共济的人，也会成为你的仇敌。
若弃德恃险，同舟之人，谁非敌国！
If you give up morality and rely solely on險要to protect yourself, those who were originally in the same boat with you will also become your enemies.