In all the world, there are people who belong to various religions - and regardless of what religion they believe in, they often have remarkable personal experiences related to the pursuit of their faith.
When these sort of 'mini-miracles' happen, they may reason that God is supporting their particular brand of religion. A Catholic might think that the Virgin Mother or some Saint helped them. For a Muslim, Allah has shown mercy. If a Witness finds an interested person at That Last Door That They Weren't Going To Knock On But Did Anyway, it's Jehovah's Holy Spirit.
Except that such experiences aren't 'God' at all, in the sense of a single personal Creator reaching out to one person: they're just Synchronicity at work.
See:
http://en.wikipedia.org/wiki/Synchronicity
I write this, about the common experience of 'magic' or The Divine in the lives of ordinary people, because I regularly encounter Synchronicity in my life - and it can be very stunning. You struggle with some horrible emergency and then improbably find the one person who can fix things completely by accident. You think about someone and run into them in the most unlikely circumstance - and so on.
Victor Mansfield (Astrophysicist) wrote a whole book on the subject and its meaning. I actually met him once at a book signing (an interesting guy).
To me, Synchronicity brings up possibilities to be considered but not absolute guidance - which differenciates it from the idea of Holy Spirit. It's just a part of human experience that suggests that we are more than 'just human' - and the Universe reacts to our internal emotional states WITHOUT regard to any "true" religion.
metatron