Usage of "as it does" as a parenthesis The paragraph below is an excerpt from the book named On the Study of Words. There are two questions: 1 What function and meaning does the parenthetic clause "as it does" have? 2 What relative adverb can supplant "that" in the middle of the paragraph? (I assume "when" can do.) (I used square brackets[] to signalize the points of which I have a question.) I attach my brief paraphrase at the end.Original Text We indeed hear it not seldom said that ignorance is the mother of admiration. No falser word was ever spoken, and hardly a more mischievous one; implying, [as it does], that this healthiest exercise of the mind rests, for the most part, on a deceit and a delusion, and that with larger knowledge it would cease; while, in truth, for once [that] ignorance leads us to admire that which with fuller insight we should perceive to be a common thing, one demanding no such tribute from us, a hundred, nay, a thousand times, it prevents us from admiring that which is admirable indeed. My paraphrase We certainly hear people say frequently that ignorance is the mother of admiration. This statement is utterly incorrect and one of the most injurious words. It implies that this helthiest excercise, namely ignorance, is chiefly based upon a deceit and delusion, and also implies that ignorance would disappear with larger knowledge, whereas, in reality, per once that ignorance leads us to admire the thing which, with more comprehensive insight, we should recognize as a common thing which is not worth receiving such praise from us, a hundred, or rather, a thousand times, it prevents us from admiring what should actually be admired. Thank you for reading to the end. Perhaps you would explain.