Artful Dodger: I meant that we clearly agree that proving existence is easier than proving non-existence.

As for cosmological arguments, I'm not a big fan of them. First of all, even though I view the Big Bang theory as the most likely scenario, it still is only a theory. And there is a vast unexplained area in the theory, too. I have already found out that I will never fully understand what made the universe look the way it looks and how it actually looks. And nobody will ever understand that – it's simply beyond our limited thinking. Secondly and (maybe) more importantly, my problem with cosmological arguments is that I don't think there had to be a cause. I know that our experience tells us that every action brings reaction and that effect must have a cause, but how do we know this was also the case under as exteme conditions as at the time of the creation of time and space?