Guido, if there's one thing the Bible makes absolutely crystal clear, it's that the existence of God does
not guarantee the absence of breaches of the laws of nature. On the contrary, the book is full of God making donkeys talk and making the sun stand still in the sky and raising the dead and turning water into wine. (Not to mention the supporting cast of wizards and witches and saints and magi with their various magical powers.)
The Bible teaches us that there is a being who can, and who does violate the laws of nature, and who has motivations so inscrutable as to appear to us merely capricious: a being who can do anything and might. If you want to worry about the universe turning into an elephant, worry about
him doing it. Certainly you cannot claim that the existence of an entity who can and does perform miracles would act as a guarantee that miracles will
not take place.