It's not as easy as that. You probably saw Jody Foster's character in First contact. Only she and the audience are the legitimate source for knowing what really happened to her, and we only know what happened according to the film script. Knowing there is a God is the same thing. You fall through this hole and you know. If your hole appears in a Christian context you find Jesus, if a Buddhist, enlightenment, etc. There are all these legitimate sources whose words about what happened are based on words from their past, from how they speak of this internal experience. The God experience is know only to those who know it but all those who know it have no doubt.
What troubles me about Rob is the fantastical nature of how he describes his knowledge, as if the words he uses to portray it are what is true, and not the essence of his experience. He and thousands of others of religious faith paint such a ridiculous picture of their knowledge that it turns everybody else off.
The religious person can never make religion sound reasonable to a non religious mind, a mind that has rejected the obvious horse shit, or cabbage that religious folk propound.
As a result, few that reject religion can get from there back to real understanding. Fool me once and all that shit...
This is why all the real teachers lead by example. They are folk who act in ways that make the right kind of people say, "I wish I were like that. He or she sees in ways I never imagined. How come?" There is a peasant woman from India, a fisherman's daughter I believe, who had enough food to feed some of her neighbors as a child. She developed so much love and empathy that today she had hugged millions and millions of people, owns hospitals and has built thousands of homes for the poor. All she does is manifest true being.