The problem of time is a serious conundrum for Christian and other Abrahamic religions: God, since he must have always existed, evidently waited a very long time before creating the world. In fact, he waited for an eternity. How can this be? How can it be that the author of the universe and everything in it spent an eternity before creating the cosmos? This question is relevant both to theism and to Deism; it is central to the question of any deity whatever.