Hmm . . . so does that mean that I should automatically toss out any citations you make from conservative Catholic authors as having an agenda (that being to prop up the RCC)?
No, feel free to quote liberal proponents of, e.g., women's ordination here if you like. Just don't expect many of us to give them much credibility.
BTW, he's more or less paraphrasing a quotation from Cardinal Newman. Newman included "the giving of the ring in marriage" as one of the Christianized pagan customs in his list. Y'all better get rid of those wedding rings. ;-)