Pascal's Wager is the ultimate con game to gain belief. For instance, I have a lotion. I want to sell it to you. I tell you it is a magic lotion that prevents sharks from attacking you. Since you have no proof that what I am saying is false then it might be better to believe in the lotion than allow yourself the risk of being attacked by a shark. Well, if you're an easy mark, I just made money and got you to believe in something out of fear. That is Pascals Wager. Better to believe in the 'lotion' than to face the possibility that I may be right about the danger that I claim you face.
I've never liked Pascal's Wager, but until now, could not give a simple explanation why other than it seemed wrong. Now this simple paragraph really puts the wager in perspective.