Allen, I'm not sure what you mean when you say the phrase 'at sixes and sevens' has an earthly origin. I thought
all phrases did. All I said was that it was ancient; the reference to the Bible was in parenthesis. I'm also sorry to have to say I don't agree with your account of its origin. If you click
http://www.worldwidewords.org/qa/qa-six1.htm
you will find an explanation from a respected source that I
do agree with. Since it's the one that agrees with the explanation offered by The Oxford English Dictionary - the bible of word/phrase etymology - too, I'm doubly convinced it's right. (If you meant your opening comment kindly, I thank you for it.) Cheers