I don't really know how to comment an essay.
I think it's tragic, that there are only few upvotes and no constructive comments.

Should you have included 'Descartes' in the title ? (I think so)

Would any of his 'Meditations' made have any sense without the 'God' part ? - I don't think so; it's crucial.
If he hadn't started on the pretense that there is only one truth, it would have ended in desaster.

The only reason that dismissing everything external doesn't lead him to madness, is this underlying 'truth' he believes in -he personifies it to 'God'.

I will write an essay about it.