《资治通鉴·魏纪·魏纪二》
如果无法击败敌人，就应该保全自己，为什么在这样危险的情况下，不感到恐惧呢？
就不破贼，尚当自完，奈何乘危，不以为惧！
If we are not able to defeat the enemy, we should be preserving our own strength, so why are we not afraid when we are in such a dangerous situation?