My reasons for marrying are, first, that I think it a right thing for every clergyman in easy circumstances (like myself) to set the example of matrimony in his parish. Secondly, that I am convinced it will add very greatly to my happiness; and thirdly -- which perhaps I ought to have mentioned earlier, that it is the particular advice and recommendation of the very noble lady whom I have the honour of calling patroness. Twice has she condescended to give me her opinion (unasked too!) on this subject; and it was but the very Saturday night before I left Hunsford -- between our pools at quadrille, while Mrs. Jenkinson was arranging Miss de Bourgh's foot-stool, that she said, "Mr. Collins, you must marry. A clergyman like you must marry. -- Chuse properly, chuse a gentlewoman for my sake; and for your own, let her be an active, useful sort of person, not brought up high, but able to make a small income go a good way. This is my advice. Find such a woman as soon as you can, bring her to Hunsford, and I will visit her." Allow me, by the way, to observe, my fair cousin, that I do not reckon the notice and kindness of Lady Catherine de Bourgh as among the least of the advantages in my power to offer. You will find her manners beyond any thing I can describe; and your wit and vivacity I think must be acceptable to her, especially when tempered with the silence and respect which her rank will inevitably excite.

请教老师：

I do not reckon the notice and kindness of Lady Catherine de Bourgh as among the least of the advantages...中not...the least 是not at all 的意思吗？那么，这句话应该怎么翻译呢？

麻烦老师在这里顺便讲解一下the least 和 not the least 和 not in the least of 用法，尤其是意思究竟有什么不同？一直很困惑。

另外，when tempered with the silence and respect which her rank will inevitably excite 该句中，tempered 是被动态吗？这句话是什么意思呢？