I know that it will be almost impossible to convince atheists about the existence of god but theists have reasons also why their belief in god is certain. One of my reasons why I believe is perfection. Disregarding what the bible said and what religion teaches, there are other good reasons to believe in god.
The philosophy of Thomas Aquinas is quite a good explanation as seen here: http://web.mnstate.edu/gracyk/courses/web%20publishing/aquinasfiveways_a...
I also found this interesting article about reasons to believe in god: http://www.everystudent.com/features/isthere.html
I hope atheists out there will take time to read those links too.
Let us know your view.
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