I have always maintained that chaos is fundamental, the state from which all reality springs and the state to which it perpetually returns - the law of its weaving and unraveling. God must needs be come from chaos, which precedes it as origin. God, in fact, is the human spell cast to bind chaos. Reason, instead, tries to harness and direct it, driven to uncovering greater and deeper sources of it, never sated, having once tasted the awesome and demonic power.
Of course, we always conceive of chaos as madness, profusion, and violence. But there is also chaos in absolute uniformity. The heat-death of the universe, when all entropic movement ceases, is as chaotic as the star-birthing convulsions of the big bang, in fact, more so. The random coalesence of matter we call the universe, while formally unpredictable, embodies the chaos of emergent form. The thermo-dynamic end, however, is devoid of form, and inditinguishable from nothingness.