Imagine you are in a dark room. Not completely dark, you can see little. You can see something round on a table and you don't know what it is – that is a mystery. You might think – it's an orange – that is a theory. But you can think it could be also a tennis ball – that is another theory. If it is a tennis ball, it can't be an orange and wise versa – that is a contradiction. You can go closer, take it, smell it and get more information to come up with a better theory – that is science. But you can also say that a mysterious way it is the same time a tennis ball and an orange – that is theology.