Not quite a marriage resource, per se! But I've always loved the late Clifford Simak's writing style. He was a newspaper editor and science fiction author. Wrote what many characterize as "pastoral science fiction" - a comforting distinction from what many classify as science fiction these days (e.g., Transformers).
The main character, Enoch Wallace, fought in the Civil War and yet is still a healthy young man in the 1960's, when the book was written. This quote from the book gave me goosebumps:
"And that had not been the first time nor had it been the last, but all the years of killing boiled down in essence to that single moment-not the time that came after, but that long and terrible instant when he had watched the lines of men purposefully striding up the slope to kill him.
It had been in that moment that he had realized the insanity of war, the futile gesture that in time became all but meaningless, the unreasoning rage that must be nursed long beyond the memory of the incident that had caused the rage, the sheer illogic that one man, by death of misery, might prove a right or uphold a principle.
Somewhere, he thought, on the long backtrack of history, the human race had accepted an insanity for a principle and had persisted in it until today that insanity-turned-principle stood ready to wipe out, if not the race itself, at least all of those things, both material and immaterial, that had been fashioned as symbols of humanity through many hard-won centuries."