But it is not in the nature of pure love to burn so fiercely and unkindly long.

但是，纯洁的爱在性质上并不会猛烈地、无情地长久燃烧。

youdao

Pen used to brag and talk in his impetuous way to Warrington, "I was in love so fiercely in my youth, that I have burned out that flame for ever."

潘往往自我吹嘘，向沃林顿狂妄自大地说：“我年轻的时候，已堕入了情网，忘乎所以，我想，我的热情已经消耗完了。”

youdao

But I still love it up there, in some ways more fiercely than ever before.

FORBES: Catskills Fly Fishing Book