Any belief system that espouses the concept that we struggle with evil because of some metaphysical tempter also contribtes to the stripping away of inherent goodness.
We have never needed an outside force to prompt us to act in self-interested ways.
We do a good enough job of that on our own.
The attempt to dislocate the worst of ourselves onto some abstraction of evil only prevents us from taking steps to right the underlying issues that give rise to our darkness.
That being said, by also abdicating the good that we do to only acts of divinity robs us of the best of ourselves.
By saying we do not illuminate light, but only reflect it, we deny our innate spark and smother our inherent goodness.
Why is it that we attempt to deny our darkness and refuse to believe we are capable of emitting light?