“The light shines in the darkness, and the darkness has not overcome it.” ( John 1.5)
For me, the darkness is at least as much my unknowing as it is any externally imagined source of evil. Unknowing can be turning away from knowing, closing one’s eyes to the light; or it can be simply the incapacity, the sheer tininess of the human mind before the isness of God.
The light, however, shines with uninterrupted love and presence. Christ is not limited, and his mercy does not depend on our receptiveness, or even on our repentance - much as it may lead in the end to that.
The light isn’t anything we may see by the light, and to dwell on what it shows us is plainly to miss the point. “Mind the light” - that is our job. At the last, that may be all that does matter...