The light shines in the darkness, and the darkness has not overcome it (John 1:5).
This is the nature of light and dark.
We instinctively fear the dark and crave light. In fact, a flashlight or candle or somesuch is near the top of every emergency supplies list. And it’s not just for the practical value–light is also, by its very nature, comforting and encouraging.
The deepest, blackest darkness can be pushed back by the light of a single candle.
Metaphorically and literally
An alternate translation of this verse is, The light shines in the darkness, and the darkness has not understood it. As though if only the enemies of God could really understand his light, his love, his purpose for us…everything would be different.
If only the darkness in me could truly understand…