Begin with dhyana, with meditation, and end in samadhi, in ecstasy, and you will know what God is. It is not a hypothesis, it is an experience. You have to LIVE it - that is the only way to know it.
I'm convinced that the most important division in human affairs is probably not the one between left and right, liberal and conservative. It's the one between zealotry and understanding, between absolute conviction and compromise, between preachers and politicians.