【誓不两立】〖shì bù ling lì〗[swear not to exist together under the same heaven; I'll have it out with; I swear that both of us cannot stand -- to be irreconcilable; One of us two has to go, we shall not both live]

誓天指日灭私制，

不避艰险拯救世。

两鬓斑白著诗典，

立德立言大同启。

发誓不与敌人并存。指双方仇恨极深，不能同时存在。swear not to coexist with enemy. Refers hatred is very deep, can not exist simultaneously. 同：不共戴天、你死我活。反：情投意合、亲密无间。