http://www.atheistthinktank.net/thinktank/index.php?topic=6828.30
what is infinity divided by two? infinity. let's say you have an infinite number of dominoes. in order for a single domino to fall, and infinite number must fall before it. when will it fall? never. if all there is is a material universe, in which an infinite number of causes must have happened before this one, we could have never arrived to this moment! That's why I think there must be an original casue (for our universe must have started) and that there must be an immaterial cause to the universe.