Actually, even more precisely: "Don't rely on luck to get your sorry ass into heaven." "Snapping for a seven" -- snapping the fingers as the bones hit the ground or bounced off the wall -- was, depending on the players, a bit of superstitious invocation of good luck, or maybe more narrowly an attempt to get the attention of the Goddess of Good Fortune (a.k.a. Lady Luck) to intercede and produce a winning roll. You can, however, get into heaven if you "Live clean, don' have no fault," luck having nothing to do with it.

michael