A longish paragraph from The Bad Book (as a friend calls it now) [see here and here], on p. 111:
Alas by withholding ourselves, or pieces of ourselves, instead of giving to our marriages wholeheartedly, we can't expect our husbands to do so, either. After all, it's not as if postponing marriage and going into it with our eyes more wide-open has made marriage any more stable than it was when men and women went into it practically blind. A young man I know told me that he'd "at last" moved in with his girlfriend of a few years. "We're more serious now," he said proudly. And I thought, No you're not. For marriage, as the married know, is about more than signing a lease, splitting bills, sharing chores, and professing a vague sort of long-term commitment; it's about more than being home in the evenings or spending weekends together or deciding what color to paint the walls; it's about more, even, than happiness and contentment and compatibility. It is about life and death, blood and sacrifice, about this generation and the next, and one's connection to eternity.
I'm just violating copyright because I'm too lazy to bookmark the notable quotes I come across and want quick access to them for future reference. Plus I borrowed the book from the library.