How can you possibly begin to prove that opinion? I can't prove that God exists, but you most certainly cannot prove that he doesn't. You can't even prove that you're actually sitting in front of your computer. For all you know, you're a fish dreaming that you're a dude sitting in front of a computer. Don't even begin to say "it's impossible for anything to exist outside of time" when you aren't even capapble of proving your own existence inside time.