Imagine that you're walking along in a field, and you come upn a watch on the ground. You pick it up and admire its complexity, apparently contrived by an intelligent designer for a particular purpose - that of telling time. It would not occur to you to imagine that such an object had literally been there forever and had never been brought into existence at all. That would be ludicrous.

Nor would it enter your mind that such a complex set of interworking parts just happened to come into their structural relationship and thus come into being as a watch merely by the outworkings of chance.

You'd assume instead that the mechanism had been designed and assembled by a highly intelligent and very skilled being - a person - and that it was such a being who most likely was responsible in some way for its being in the field.

The natural world around us contains many apparently complex and seemingly well-designed working structures that appear to serve well various purposes. Again, it is improbable that these natural processes and structures have been here forever or ot have been produced by blind chance, as it would the watch to either lie in the field forever, or to have come together by chance. The conclusion, is there is a divine watchmaker, a divine designer, behind the mechanisms of nature responsible for the designs we see there.

As a house imples a builder, and a garment a weaver, and a door a carpenter, so does the existence of the Universe imply a creator.