Criticisms of Pascal's Wager

One of the most obvious objections to the Wager is based on the nature of belief. Can we "will" to believe a proposition? Even if belief in a specific proposition has a tremendous payoff, will the payoff force me to believe sincerely in the proposition? For example, if I offered you a million dollars to believe in the proposition "the law of gravity no longer applies to me" could you "will" yourself to believe the proposition? You might act as if you really believed it (whom would not for a million dollars!) but would you really believe that the law of gravity no longer applies to you?

Another objection is based on the implicit assumptions concerning the nature of God as found within the Wager. How do we know that God will send believers to heaven and the nonbelievers to hell? What if a nonbeliever was a really good person - is it not possible that God would reward or show mercy to that person? Will God reward those who believe simply for the sake of receiving a tremendous payoff? Even among those who do believe in God the answers to the above questions will not be the same. In short, we can not know with certainty that  the payoffs and penalties for faith are as Pascal assumed they would be.