I know very well that darkness exists (it spans the globe, always has and always will), but my bias is not FOR it, it is AGAINST it), neither do I choose to be a mirror in order to compare other people to myself or any other standard (no desire to be judgemental), nor would I consider myself to be the standard that others should "measure up to" (Jesus did say "think of others as better than yourself").
The ability to recognize "darkness" comes from having a good sense of justice (a very noble attitude), but in our zeal to recognize darkness (and our distaste for it), we tend to go too far and color the mirror that we use black (bias, pre-concieved notions against others).
A mirror does exist (God and His scripture), but having the CAUSE of detecting all of the hypocrisy and evil in the world is not our affair and shouldn't be our desire (it's useless, MILITANCY).
I only walk in the valley of the SHADOW of death (darkness). Since this death/darkness spans the globe, I (physical body) have no choice but to walk in the valleys, but "I" need not fear it (simply endure adversity) because "I" (soul/mind) have chosen to be in The Lord's world.
The darkness is dark enough, don't be like a black hole in space and suck all existence into a pit of nothingness (it's just chasing after the wind).