The universe has existed for 14 billion years or something and has been expanding ever since. The speed of light is blah blah blah. Nothing goes faster than the speed of light. That's your limit for the current size of the universe. Your "infinite possibilities" logic doesn't sound perfect anymore, does it? You're also assuming that time (or at least, in our universe) will go on forever. What happens if the universe decides to collapse? Ever heard of the Big Crunch or Big Rip theories? You're making too many assumptions.
Also that kind of logic can't work since infinity isn't a value; it's a mathematical concept. There's no such thing as infinite area or volume. Not in the physical world, at least.
As for being on topic, no I don't believe in magic. I believe that everything can be explained scientifically or logically, even though it may not appear so at first. I'm sure you could've guessed that already :p I did believe in it when I was a little kid though. Admit it, everyone did.