I'd like to know more about this? 
It's a little tricky to explain

. In Judaism, God is not considered an earthly concept, let alone a 'being'. It's a little difficult to describe, because we consider God to either 'exist' in a reality separate to our own, or outside of reality itself. There are a number of Middle-Ages Kabbalistic writings that ponder the nature of reality in the context of God - essentially (and I'm editorialising for the sake of brevity) one of the questions it poses is that if God is the 'supreme notion' then by proxy, the medium in which God 'exists' - which we consider to be beyond earthly understanding and the human perception of what
is - is the true reality. As such, what are we experiencing right now? How do we explain reality when it is held up to the concept of God?
As you can see, Kabbalistic thought delves very much into the metaphysical (spiritual texts such as the Zohar expound upon this).
Here is the wikipedia article of the Zohar; it contains thought and concepts that I, personally, find magnificent.
On a side note, concepts like this demonstrate some interesting divergences between Semitic religions like Judaism and Christianity: Christians (or so I understand it) believe that Jesus was the earthly manifestation of the divine spirit - but this is incompatible with the Jewish notion of divine perfection (which states that God cannot be remotely Earthly as per the assumed 'nature' of God). A further distinction is the Christian notion of good and evil versus the Jewish interpretation; in Christianity, Satan is the diametric opposite of God's divinity, and has control over 'hell'. Conversely in Judaism, Satan/Sataniel is simply another angel who embodies temptation and brings forth the sins of one's life in the Heavenly Court (it is
vital to understand that in Judaism, angels have no free will whatsoever; hence, 'Satan' cannot embody what is not a Godly concept - i.e. evil is simply part of the reality we exist in). Judaism also has no concept of hell.
A further area of extreme interest is the concept of Free Will in Judaism. As God is considered omnipotent, how is it that humanity can have free will?
Here is one of the Judaic explanations.