My faith in God is based upon my own mystical experiences where I've felt his presense in my life. It's not a religious thing. My belief is that God created us to glorify himself through our knowlege of him which he imparts at his leisure.
What can I tell you? I've wrestled with my experience of God for years debating with myself and others if it was a genuine objective reality, or nothing more than neurons firing in my brain giving me a purely subjective experience that has no reality beyond that.
What I'm left with is a dilemna similar to Keirkegaard's leap of faith. I can etiher discount my experience as being a phantasm, or I can trust my own judgement which tells me it was a fulfillment of purpose. Unless more evidence is presented to the contrary, I'll choose the latter.