If the universe is eternal, then there is no necessity for an ultimate mover or a creator demiurge because everything in the universe has always existed and is transforming and moving in accordance with the laws of physics. But the universe cannot be eternal because it does not contain any component part that does not undergo transformation. From common sense experience we know that all things which undergo transformation are either material or mental and have a beginning and an end. If everything in the universe is undergoing transformation, then the quality of eternality cannot be attributed to the universe as a whole. The universe must have a beginning, and if it has a beginning, then it’s logical to believe that there is a creator involved.