I think that I have not taken enough LSD for questions like this. Also I had my annual existential crisis last week, so I am determined to not have another one until next year.

I think, therefore I am ? I am, therefore I exist ? Maybe I fail to see the point.

This line of thought seems to rely on existence and verified existence being co-extensional (if not equivalent). Perhaps Kurt Gödel showed us otherwise.

Because you haven't found God yet doesn't mean you won't find God.

I think the last time I pondered such questions I was 14 years old and drunk ;)