Polarity is the epitome of the process of life- this is the stability that grants existence as a altogether prior essential. This occurs when we avoid stacking 'good' and 'bad' on the world itself. This is "The Will to Power" and Heraclitus's notion of the world as strife.
Experience modulates us in and of itself- our interpretations remain interpretations, not the reality of those events which we instinctively adapt to merely by virtue having experienced them.
To immerse oneself in the rapids is what is 'dark'. The rapids do not fancy themselves dark.