**Pascal's wager** is the name for an idea by a person named Blaise Pascal. He said that it is not possible to prove or disprove that God exists and that when it comes to God’s existence, we are taking a big risk with our lives. Pascal thought it is better to bet that God exists, and therefore to live so and try to believe in Him. If God doesn't exist, we might lose some things, but if He does exist, we could gain a lot, like eternal happiness in Heaven. If God did not exist it would make no difference. For this reason, it would be better to believe in God, Pascal said. Critics say it's hard to prove God's existence and that true belief should not be based on what we might gain. Despite the criticism, Pascal's wager is still talked about, making people think about belief and whether there is a higher power.

Pascal's argument is that reason and intellect cannot decide the question of whether God exists or not; therefore, it makes sense to choose the option that would benefit us most should we be right, and harm us the least should we be wrong. Accordingly, the options would be as follows: 

1. You may live a religious and moral life and be rewarded by eternal happiness.

2. You may live a pleasure-seeking life and be denied eternal happiness.

3. You may live a holy life but there is actually no God or eternal life.

4. You may live a pleasure-seeking life but it makes no difference because there is no God. 

For Pascal, the first of these options is the most important one because it represents the maximum gain and loss. Even if it should turn out that there is no God, the risk of deciding against such a possibility means that we should take that option.

The case against Pascal's wager
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The argument from inconsistent revelations shows we have no idea which hell to avoid since many different religions exist with different beliefs about hell. Within religions there are different denominations and sects with different ideas about heaven and hell. If we try to avoid the hell that Christians believe in we are at risk from the hell Muslims believe. So it goes on. Perhaps God does not like people who accept Pascal's Wager but god may not mind that atheists doubt. Atheists and believers could both be in trouble or neither could be in trouble. 

1. A moral and loving god that deserves respect will not mind when people doubt and do not believe in it for rational reason. Such a god will not punish us for critical thinking or for doubting statements from other imperfect human beings.
2. A moral and loving god that deserves respect will disapprove when believers accept immoral acts that are in religious texts. One example is Abraham being ready to sacrifice Isaac in the Old Testament. A good god would want Abraham to value compassion more than fear and loyalty and to spare Isaac. A good god would reward Abraham for sparing Isaac. A moral and loving god that deserves respect will condemn very many cases of genocide also in the Old Testament and will disapprove when believers imagine genocide can be moral.

Further two of the three Abrahamic religions, Christianity and Islam claim worshiping other gods is sinful. Judaism, however is different, being older and clarifies that as long as you acknowledge the existence of the god of Abraham, and don't blaspheme the name, you do not need to worship any deity, and may worship any you like. The loss of understanding and ignoring the Noahide Laws has muddled the issue. [biased]

We have no proof that any particular deity is real, but as there is no wrong deity as long as you acknowledge the Abrahamic one, meaning Pascal's Wager stands, belief is the only safe bet. [incoherent]

Importance in history
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Pierre de Fermat and Pascal created probability theory. Pascal's Wager was very important for the time, because it did new things with probability theory. It is also one of the first tries to use the concept of infinity, and the first use of decision theory. It was important for other philosophers who developed the ideas of pragmatism and voluntarism.