Spirit of Spirit
Symbolism: Unknown
+ve: to be, Freedom, -ve: Anarchy.
The Ancient Greeks believed that everything began with the Element of Spirit, so this seems a good place to start.
I used an empty white circle to symbolise the Void (although it could just have easily been a circle of black - it is the emptiness that has significance, not the colour). The Void represents pure Potential, it is nothing, but has the potential to be everything.