Pascal's wager recommended believing in a supreme being because not to believe in one and be proven wrong, was disastrous.But consider the ramifications of believing and being proven wrong. Might they not be even more disastrous, dividing our attention between our one brief and precious moment in time and an illusory afterlife?

Not at all. I fully believe Christianity to be true. But I have also come to the realization that even if it were false, I would still want to believe it. Pascal seem to think that there was only a slight negative utility attached to believing in God if God actually doesn't exist. He therefore thought that the extreme high utility of believing in God if God does exists should outweigh the minor negative utility of false belief. But I would actually say, looking at my life, that there is a pretty high positive utility to believing in God here and now, even if (as I think is logically impossible) He didn't exist.

Well there in your second sentence is the problem. You'd rather believe something that is false than something that is true. At that point all hope is lost.