Snatched from a post in
atheism:
"The point is that the God that most people worship plays such an important role in the universe that you should be able to use the scientific method to detect His presence. [...] If the kind of God that most people in the West believe in existed, it would have effects that would violate the laws of physics and that would be empirically measurable. Otherwise, a universe with God would look exactly like a universe without God, and there would be no rational reason for assuming God’s existence."
--Victor Stenger,“God: The Failed Hypothesis.”
I love this quote! So elegant and concise, it's just worded perfectly.