刚正不阿的英文：
[Literal Meaning]
firm/upright/not/flatter
to be upright and never stooping to flattery

[解释]
刚强正直，不逢迎别人。

[Explanation]
to be righteous

[例子]
宋朝的包公刚正不阿，把皇帝的女婿也判处了死刑。

[Example]
Bao Gong in Song Dynasty was righteous and executed the emperor's son-in-law.

A person of stern(moral)rectitude
刚正不阿的人.

His reputation for integrity was permanently fractured.
他那刚正不阿的声誉被永远地毁了。

You're being very scrupulous, but to what end?
你确实刚正不阿，但图了什么呢？