What am I?

What am IIf not waterBound in a boundless spaceFlowing directionless,hardly leaving a trace What am IIf not the windHowling unheardBlowing away to the unknownand, in my trance, I dance alone What am IIf not the cloudSubdued and simplisticon a serene summer dayYet defiant with thunder when pushed to the edge What am IIf not a…