used but never used up.
It is like the eternal void:
filled with infinite possibilities.
It is hidden but always present.
I don't know who gave birth to it.
It is older than God.
Verse 4, A New English Version
(Okay, speaking of used up, voids, and birth, I thought I might break my Zen and highlight THIS article to get the conversation started. Perhaps we can focus on the psychology of this type of warfare!)