Thematic Bible: What manifests things

The ground of his condemnation is this, that though the Light has come into the world, men preferred the darkness to the Light, because their actions were wicked. For he who lives an evil life hates the light, and will not come to it, for fear that his actions should be exposed; But he who acts up to the truth comes to the light, that his actions may be shown to have been done in dependence upon God.

All such actions, when exposed, have their true character made manifest by the Light. For everything that has its true character made manifest is clear as light. And that is why it is said--'Sleeper, awake! Arise from the dead, and the Christ shall give thee light!'