What you're describing here are rituals, which can be based on and built around any belief. It's not clear to me why we should use the belief in a non-existent God, one that traditionally casts women in a submissive role. Furthermore, you're describing a difference between self-imposed discipline and discipline based on outside pressure, be it the command of God, or the witnesses at your marriage; self-imposed discipline works just fine for me and, I'd wager, for anyone who's sincere in their intent and relationships. I don't believe the divorce rate is much lower among couples married in Church than those married before a government clerk.

Also, historically marriage hasn't been a good thing, I would say. But I won't expand on its patriarchal origin and nature, or the fact that the woman was considered to be the man's property. I'll say, thank God (pun intended) that divorce has become so much easier throughout the years, as too many individuals, mainly women, have been stuck in an "unhappy ever after" marriage for far too long.

But that's all tangential; for me, there is no God, for you there is. I can't prove that God doesn't exist, for it's impossible to prove a negative. As a side note, that's how George W. Bush's administration painted Saddam Hussein a liar; they said "Prove that you don't have weapons of mass destruction"... Which is impossible of course. The burden of proof always sits with the one making a positive claim, in that case, it was America's burden to prove that Iraq did have WMDs. And in this case, as far as I'm concerned, the religious believer bears the burden of proving that their God exists. Since no one has ever been able to do that, not even William Lane Craig, it's more reasonable to believe that he or she doesn't exist.

...it is a fact that some human being finally wrote down these commandments.

How can it sound the same to your ears when "the wrath of Gandalf" is not based on a two-thousand-year history of Christianity, i.e. not even remotely connected to the existing faith of people?

Yes. Someone did indeed. So I ask again: what makes the Bible special? If it's not written through "Divine inspiration", what makes it better than The Lord of the Rings? If the Bible isn't the word of that special, infallible being you say you need to have your inner conversations with, what exactly makes it special then?

Is it the number of people who believe in it, as you suggest in this last response? Give it time, my friend; it may well be that in 10,000 years The Lord of the Rings has become that "special" book ;-)