And indeed this concept has made for a lot of the friction between religionists and scientists. After all, with every new discovery, the gaps get smaller and thus God becomes less. So explaining the universe, just by using your senses and not saying one thing about God one way or another becomes blasphemous. It was easy enough when our gaps were so much bigger, but as the gaps started narrowing in the past few centuries, people become more zealous in defending those that remain.