伦纳德这位坚定的无神论者实在是无法理解。用英语怎么说？

伦纳德这位坚定的无神论者实在是无法理解。

Leonard, a confirmed atheist, simply could not understand.

Leonard

n. 男子名；

例句
Finally in the programme, we come to the news that the American composer and conductor, Leonard Bernstein, has died...
节目的最后，我们来看一则新闻，美国作曲家兼指挥家伦纳德·伯恩斯坦去世。

confirmed

adj. 确认的，坚定的，根深蒂固的；v. 批准(confirm的过去式和过去分词)，证实；

例句
This album confirmed The Orb's status as national stars, going straight to Number One in the charts...
这张专辑确立了The Orb作为全国明星的地位，销量直升至排行榜首位。

atheist

n. 无神论者；

例句
She was an atheist but now she says she's seen the light.
她本来是个无神论者,可是现在她说自己的信仰改变了.

simply

adv. 简单地，朴素地，（引出概括或解释）不过，仅仅，简直，<非正>实在；

例句
Many parents simply abdicate all responsibility for their children.
许多父母对孩子简直是完全撒手不管。

could

aux. “can”的过去式，能够，打算，用于假设语气的条件句，用于虚拟语气的结论句；

例句
The regulations were relaxed and the prisoners could get out and about a bit.
规定有所放宽，犯人可以出去短暂放风。

not

adv. 不，[用以表示否定、否认、拒绝、禁止等]不是，几乎不，未必，没有[用于否定后面的词或短语]；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

understand

vt.& vi. 懂，理解；vt. 了解，默认，听说，领会；

例句
Another accusation levelled at the Minister is that he does not understand ordinary people...
另一个矛头则直指部长不懂得体恤百姓。