http://bible.com/111/jhn.3.20-21.niv Everyone who does evil hates the light, and will not come into the light for fear that their deeds will be exposed. But whoever lives by the truth comes into the light, so that it may be seen plainly that what they have done has been done in the sight of God.
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This explains why the world runs to the darkness and why we turn to Jesus. Jesus being the light will remove all the darkness in are hearts and this is something that the world doesn’t want.