I was going to Title this 'Life, The Universe and Everything' but Douglas Adams beat me to it.
This was going to be a long and very detailed version of my personnel beliefs, I even typed it up in Word so I could 'copy and paste' it over, when I realized that I didn't need 'all that'.
However the basics are still the basics and I've been saying I'd post a 'story' that explains stuff from my point of view so here it is.
The Beginning: Empty void, Nothingness pressing in on itself until...
Energy explodes outward with a 'big bang'.
From this Energy an Intelligence is formed. This new intelligence chooses a form for itself and 'realizes' it has the ability to Create things with the unformed energy that it is a part of and that surrounds it. It creates other intelligences and they have the 'power' to use the energy that they are a part of and that surrounds them, but they themselves cannot 'create' anything from this energy, only the first may do this.
The First Intelligence then creates 'Heaven, Earth, Water... The 'whole creation story'... As the energy came together to form this new 'physical realm' lesser intelligences are formed with 'attachments' to the new physical things (Earth, Water, Air, Fire...).
Then the first Intelligence creates 'man' and shapes it into a 'likeness' of the original form it chose for itself. This new creation 'mankind' is a vessel so that the Intelligences that were called forth from the 'Energy' could experience a 'physical' existence.
In so choosing to experience a physical existence they cross a 'veil', which causes them to 'forget' from whence they came. When the physical body they inhabit 'dies' these Intelligences once again cross the 'veil' to return to the presence of the First Intelligence.
All of creation is formed from the energy released by the Great Explosion of Nothingness (As manipulated by the First Intelligence) and as such is a part of us. It influences us and we can influence it. Some Consciously (Psychic's) others Unconsciously, and others nearly not at all. Some 'know' how to control it (Memories from across the veil), others can be taught how, while some could care less nor even believe it's possible. This connection manifests differently from age to age, person to person. Some can Heal, some can 'see the future' and there are those that can speak with 'spirits'.
Ah, there it is...Spirits...these can be those that were formed and are associated with 'nature' (The Fey, Elementals, ect...) or those Intelligences that have come to Earth to experience a Physical body... Which has passed on but haven't crossed the veil to be back with the 'First Intelligence.' (Ghosts for lack of a better word).
I hope this helps people understand where my answers come from. I could go into so much more detail but I'm trying to remain 'Religion Netural' and keep this 'short'. Feel free to ask questions, I'll do my very best to answer them.