God is a concept our forefather's invented to protect us from ourselves.
I do not pretend to know the nature of the creator.
Can you spot E-Coli with the naked eye?
maybe not - eyes with clothes on can though
If you can "define" YOURSELF, then you can define GOD.
From the Quran, Chapter 112
Say: He is Allah, the One!
Allah, the eternally Besought of all!
He begetteth not nor was begotten.
And there is none comparable unto Him.
So in short, from the Islamic perspective, God is not a spirit, because a spirit is still a creation, and God is a creator, and not part of the creation, this is a very important concept in Islam and monotheism.
The Originator of the heavens and the earth; He made mates for you from among yourselves, and mates of the cattle too, multiplying you thereby; nothing like a likeness of Him; and He is the Hearing, the Seeing. Quran 42:11
So in short, there is nothing like Allah. Naught is as His likeness in attribute, knowledge, power and providence.
"So Dark the Con of Man"
A book saying God is eternally Besought of all aint gonna convince no one.
The definition of God that Gavin, and VADER outlined, to me at least, is not a viable definition outside a Wutang Clan forum.
In reality, the majority of people define God as a man, who is probably white with a beard, who can send you to Heaven or Hell, and promises you eternal life. Of course I've simplified things immensely right there, but the themes people believe about "God" are essentially the same worldwide.
That definition of God, and all the horrendous, manipulative bullshit that goes with it, is EVIL, and I can't support it.