I haven't been a regular poster -- more of a lurker -- but I thought I would chime in and share a a sermon by Archimandrite Aimilianos of Simonopetra, Mount Athos. It can be found at http://www.orthodoxinfo.com/praxis/marriage.aspx
I'm not sure it exactly addresses your question, but I think it speaks towards salvation through marriage in certain elements. Just an fyi, the first portion of the sermon speaks of before marriage and the second portion is regarding the 'purpose of marriage' which is more on topic for you.
Here is an excerpt:
"It is an adulteration of marriage for us to think that it is a road to happiness, as if it were a denial of the cross. The joy of marriage is for husband and wife to put their shoulders to the wheel and together go forward on the uphill road of life. "You haven't suffered? Then you haven't loved", says a certain poet. Only those who suffer can really love. And that's why sadness is a necessary feature of marriage. "Marriage", in the words of an ancient philosopher, "is a world made beautiful by hope, and strengthened by misfortune". Just as steel is fashioned in a furnace, just so is a person proved in marriage, in the fire of difficulties. When you see your marriage from a distance, everything seems wonderful. But when you get closer, you'll see just how many difficult moments it has.
God says that "it is not good for the man to be alone" (Gen 2.18), and so he placed a companion at his side, someone to help him throughout his life, especially in his struggles of faith, because in order to keep your faith, you must suffer and endure much pain. God sends his grace to all of us. He sends it, however, when he sees that we are willing to suffer. Some people, as soon as they see obstacles, run away. They forget God and the Church. But faith, God, and the Church, are not a shirt that you take off as soon as you start to sweat."
--- In LutheransLookingEast@yahoogroups.com, "Richard K. Futrell" <PastorFutrell@...> wrote:
> I was talking to an Orthodox Priest (Andrew Moore) and he shared with me that one of the main purposes of marriage is for the husband and wife to save each other. This makes sense in that God uses us to bring His salvific Word to each other--then how much more in a marriage! This is an idea that has lain fallow within Lutheranism (at least as I have known Lutheranism) and I'd like to understand it more robustly.
> Please share with me your understanding on this. Also, are there any online papers/sermons I can read on this?