Johnny, Epicurus laid it down a couple of thousand years ago. It seems to still hold up to me.

Is God willing to prevent evil, but not able?

Then he is not omnipotent.

Is he able, but not willing?

Then he is malevolent.

Is he both able and willing?

Then whence cometh evil?

Is he neither able nor willing?

Then why call him God?

In my opinion, belief in god is not rational or logical. Having "faith" is central to all religions. To have faith in the existence of god, one must refute logic and reason IMHO.