Ok, I can only really speak from the stand point of ritual magic and thaumaturgy, although it does bear close simularities with alchemy as well.
In a nutshell.
If God created everything, and before god there was nothing, then all by definition must contain an element (Or shard) of the ancient of days.
Therefore it is posible that that within each of us can be purified and refined until we become as god.
Most ritual magical theory traces itself back to egypt, which in turn traces itself back further add infinitum. So what you are dealing with in all you're enquiring about holds a common thread tracing itself right back to the damn of mankinds first furitive groping in the direction of spirituality.
The common goal of all magical practice is to "Storm the gates of heaven by force", basically to ascend above the petty human condition.
You can't really describe it because most of the what your dealing with is intensly personal and unique to the individual.
Id suggest you sign up to WWW.OCCULTFORUMS.COM
and browse what your interested in there, but the more you read the more your going to realise that its all the same, just coming at it from a different angle.
In fact, once you've become aquanted with all these subjects, and done some research in comparative religion go back and read the gospal and you'll realise that they're saying the same thing, and that the life of christ is largly alagorical.
Don't let Daggnabit catch you though he seems to take some kind of exception to this for some reason
