Serious question: can you please provide me a more exact reference than simply Ambrose? I just literally went through all of Ambrose's writings (located on newadvent.org) and could not find the term 'key' mentioned anywhere other than in ref to Jesus and to St. Peter.
In fact, the only place where I could find the quote (from a Google) was a site called immaculata-one. And that site looks to me as if it's about one step away from being a sedevacanist group. (Any site accusing BXVI of heresy is questionable in my book)
A serious request, above, as I'd like to read the context of the quote.
Thanks for your help!
I have had it a long time, I will try to dig up the source. I think it was a part of a Litany of Mary
What does that word mean?