Bog vest'

[upthera44.livejournal.com]

What is the etymology of the phrase "бог весть"? Is it any different than "вог знает"?

phrase I heard Dan Akroyd say

[satanjesus.livejournal.com]

I have always remembered a phrase Dan Akroyd said in Spies Like Us, when exposing some covert Russians... phonetically, he says, "Well, you know what they say... ne chem ne znayesh." It seems like "one doesn't know" or "one never knows."

I am wondering if it is a real saying, that way I might stop remembering it if this is meaningless.