As a clergyman, moreover, I feel it my duty to promote and establish the blessing of peace in all families within the reach of my influence; and on these grounds I flatter myself that my present overtures of good-will are highly commendable, and that the circumstance of my being next in the entail of Longbourn estate will be kindly overlooked on your side, and not lead you to reject the offered olive branch. I cannot be otherwise than concerned at being the means of injuring your amiable daughters, and beg leave to apologise for it, as well as to assure you of my readiness to make them every possible amends, -- but of this hereafter.

请教老师：

I cannot be otherwise than concerned...其中otherwise than怎么理解？另外，后面的as well as如果是表示not only, but also的意思（就是不是用于比较的意思的）似乎和上下文意思不符？