__ Peter Kreeft The Existence of God - The Argument from Change - The material world we know is a world of change. This young woman came to be 5'2", but she was not always that height. The great oak tree before us grew from the tiniest acorn. Now when something comes to be in a certain state, such as mature size, that state cannot bring itself into being. For until it comes to be, it does not exist, and if it does not yet exist, it cannot cause anything.