I really liked this comment by Bob MacDonald on Christian marriage.
The wife and the husband have gifts for each other that no one else can – and not even God – will supply.
The blog post commented upon is about whether the Apostle Paul knew the first thing about marriage and whether we should trust his opinions when he writes about it in the Bible. The article itself was interesting — tho not wholly convincing to me — and set the stage perfectly for someone like MacDonald to come along and distill the modern Christian understanding of marriage into the quote above.