(Note: this is not the same as the existing question in the FAQ, "Is not it better to believe, just in case? After all, if I'm wrong I do not lose much, but if you're wrong ..." . This entry in the FAQ is a rejection of Pascal's Wager: this here is a response to the remote possibility that God, after all, exist.)
This is a question often posed by Christians (especially Christians) to atheists. And if we're wrong, after all if God exists, and if after you die, as they say, we meet our creator?
First, I must say that this is not a possibility that actually worry me, since I have every reason to believe that there is no god or gods. The universe appears to be 100% natural, and, on one hand, science is far from knowing everything, on the other hand there is nothing up to now that absolutely requires a supernatural explanation, and can not - ever - be explained in naturalistic terms . In other words, a total absence of evidence "for" is itself a strong evidence "against" (not is that mankind has sought in its millennia of history), and therefore, all evidence suggest that the number of deities in the universe is zero.
Second, if there was a god, was still virtually impossible that human religions are right. Their gods are small, provincial, territorial, childish, insecure, and tribal. And very, very human. They have human emotions (including a good deal of jealousy, which for some reason in them is never seen as a failure of character), have a "chosen people", supposedly created a universe that we now know is incredibly vast and complex (which is not knew when religions appeared), but our small and insignificant planet is still the only thing that matters in the universe - and our physical lives are not in this world that really matters. (The idea of an ancient universe (much, much more than humanity, or even our planet), vast and incredibly diverse, simply as a "backdrop" of a test to determine if we are saved or not is completely ... espatafúrdia.) The anthropomorphic gods of our religions are so obviously created by humans, who can not be true. If there were "out there" a god capable of creating a universe, he / she would probably be too complex / a even for us to repay him / her ... and he / she certainly would not mind us, our morality, our sex lives 
Nor would the judge and places to go after death. In other words, if there really were a god in a cosmic sense, does not affect in any way - and it would be infinitely greater (and less "like us but more powerful") than the deities insecure, obstinate and obsessed with genitals of our religions.
Third, and despite all the above, there was still a god, and he / she care about us and judged us somewhat after our physical deaths? Well, depends on the standards of trial. Maybe not care about our morality, or the fact of being adored / or not, but with something completely different. We have no way of knowing. Perhaps, for example, was a deity for whom the only important thing is to treat them well our pet cats (which everyone knows to be divine).
But suppose such a being really care about our actions, our morals. In this case, the final question is: God is good or bad? Now reject the corruptions of the usual meaning of "good" such as "what God wills is by definition good." There must be some standard, and the whims of a powerful being.
Thus:
- a good God - which excludes the tyrant insecure and obsessed with sexuality in which the three monotheisms believe - reward those who had lived a good life, being in general "cool" to others, and full of curiosity to discover and learn things, following the evidence available to its logical conclusion. The available evidence does not suggest in any way the existence of a god, so believe in spite of not more than "wishful thinking" intellectually dishonest, which would not satisfy such a deity. A good God would reward good good atheists and believers, and punish bad bad believers and atheists - but would probably be a bit disappointed with the lack of curiosity and honesty on the part of believers (on the other hand, he / she would also have to explain - why hide and create the universe so that this implies its non-existence?). A good god would not be insecure or immature, and not need, want or care about the issue to be worshiped, or any other type of massage the ego. Thus, I have no fear of a good God.
- an evil god - as Yahweh or Allah (and if you disagree with me, do not walk to read your holy books, and you're up "God" you own ) - would be largely as a brutal dictator in a totalitarian regime. No one is safe from this monster, not worth the wait justice or a predictable treatment, impartial and fair. He has you, you're propriadade him, a slave, nothing more. "Grease Give it" may result for some time, but he can always torture you or kill you on a whim, because, for him, there are a human being with emotions, are a tool to use, a toy to play with. Still, "Grease give you" - that is, love it, live life according to him, and obey him blindly, no matter the suffering caused to others - will probably be the safest option. Of course, such an option, on the other hand, will make of thee a cobardezinho disgusting, without any moral integrity. This is the kind of God that really would be two places to go after death - an eternal torment for the other to give him even more "grease." The only moral thing to do in the presence of such a monster, to be condemned for having the morality he has, would spit in his face, as a final act of defiance.
Fortunately, I do not believe in the existence of anything that was described above. And that just makes me feel free and alive.
(Note: please restrict any comment that you make to the previous question and answer, and not to other matters as the existence or nonexistence of God. Thank you.)
