Unbelief hates this Light and prefers the darkness. When Christ shines on unbelief, unbelief scatters and runs the other way, much the way cockroaches scatter and hide when the light clicks on. If we love our sin and unbelief and the wickedness of our hearts, we will hate this Light. We will stay away from His Word. We will avoid confession and the Sacrament.
Sin loves the darkness.
It hides in the darkness. Like fungus, it dwells and grows in the dank darkness. Sin is destroyed by the light. Where Christ shines, sin is destroyed, death is destroyed, the darkness is destroyed. If we love sin, we will love the darkness.