The highest demonstration of reasoning that we have in any branch of knowledge can only make a fact probable, and nothing further. The most demonstrable facts of physical science are only probabilities, not facts yet. Facts are only in the senses. Facts have to be perceived, and we have to perceive religion to demonstrate it to ourselves. We have to sense God to be convinced that there is a God. We must sense the facts of religion to know that they are facts. Nothing else, and no amount of reasoning, but our own perception can make these things real for us, can make my belief firm as a rock.