Not that I'm aware of, once you have achieved it.
And my point, Lord Hyamentar, is that Vehk likely did not need the faith of the Dunmer people to hold back the moon. I was theorizing that Vehk, being a recognized thief and liar, might well have been exploiting the circumstances to command the Dunmer's respect.
Jeroic puts it well, actually, and without the heretical Vehk-hate to which I am prone.