2 Corinthians 6:14

"When you hear in Genesis 1, 

and God divided the light from the darkness, you can almost hear the spiritual principle in 

2 Corinthians 6:14. Be not unequally yoked together with unbelievers. For what fellowship hath righteousness with unrighteousness?
And or what communion hath righteousness with unrighteousness? Or what fellowship hath light with darkness? 

There should be no interaction.

When light and darkness mix, 

they both become darkness." 

Randy Skeete