In the civilian world I know many people who like to start their flights/briefs with a prayer. That's great, provided you know the people you're flying with, their beliefs etc.; however, while we're sort of still on the subject of CRM, it seems to me that this would be the easiest and most effective of all possible ways to isolate members of a crew. After all, when one prays he/she is commenting on the entire freakin' universe. Excluding a crew member like this ruins crew climate, results in that crew member being less likely to be assertive (think United 173), and in extreme cases breeds anger and frustration. Prayer has a place on a flight deck only if you are 100% certain of its result; otherwise, thank God that he's forgotten men aren't supposed to fly on your own time.