爱情要求忠诚，而忠诚要求坚贞。用英语怎么说？

爱情要求忠诚，而忠诚要求坚贞。

Love asks faith, and faith asks firmness.

love

vt.& vi. 爱，热爱，爱戴，喜欢，赞美，称赞；vt. 喜爱，喜好，喜欢，爱慕；n. 爱情，爱意，疼爱，热爱，爱人，所爱之物；

例句
I would love to go abroad this year, perhaps to the South of France.
我今年很想出国，可能是去法国南部。

asks

v. 问( ask的第三人称单数 )，询问，要求，请求；

例句
A feverish child refuses to eat and asks only for cold drinks...
发烧的孩子不愿吃东西，只会要冷饮。

faith

n. 信用，信任，信仰，信念，忠诚，宗教；int. 实在，确实；

例句
The public never had faith in his ability to handle the job...
公众从来不相信他有能力胜任这一职位。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

firmness

n. 坚固，坚实，坚定，坚决；

例句
What'simpressed me has been his considerable firmness of purpose.
令我印象深刻的是他对目标的坚定不移。