Beyond reason? How is it people fill places of worship?
I'm just asking for someone to prove that god exists and this thread could be done and over if the first religious person came here and presented some facts.
People believe in god through faith, not reason. Places of worship, in my opinion, are largely filled due to tradition: children grow up believing what their parents believe, raise kids, repeat.
Second, again I say that the absence of proof is not sufficient to assert it's opposite. That is a logical fact. For example, if no one can prove that statement "A" is true, it does not require "~A" to be true. Take Einstein's E = mc^2 for example. Just because, before Einstein, no one would have been able to prove E = mc^2 does not mean it is false. Humans are quite limited, and the faculty of reason is indeed not nearly enough to comprehend this being we are discussing, god.
I believe Descartes did attempt such a thing you seek, however. It does not convince me, and I do not believe it will convince you, but here is something to mash around I suppose (taken from Wikipedia article on Descartes' meditations):
Argument 1
1. Something cannot come from nothing.
2. The cause of an idea must have at least as much formal reality as the idea has objective reality.
3. I have in me an idea of God. This idea has infinite objective reality.
4. I cannot be the cause of this idea, since I am not an infinite and perfect being. I don't have enough formal reality. Only an infinite and perfect being could cause such an idea.
5. So God — a being with infinite formal reality — must exist (and be the source of my idea of God).
6. An absolutely perfect being is a good, benevolent being.
7. So God is benevolent.
8. So God would not deceive me and would not permit me to error without giving me a way to correct my errors.
Argument 2
1. I exist [cogito ergo sum].
2. My existence must have a cause.
3. The cause must be either:
a) myself
b) my always having existed
c) my parents
d) something less perfect than God
e) God
4. Not a. If I had created myself, I would have made myself perfect.
5. Not b. This does not solve the problem. If I am a dependent being, I need to be continually sustained by another.
6. Not c. This leads to an infinite regress.
7. Not d. The idea of perfection that exists in me cannot have originated from a non-perfect being.
8. Therefore, e. God exists.