Luke 11: 34“Your eye is a lamp that provides light for your body. When your eye is good, your whole body is filled with light. But when it is bad, your body is filled with darkness.35Make sure that the light you think you have is not actually darkness.36If you are filled with light, with no dark corners, then your whole life will be radiant, as though a floodlight were filling you with light.”

 

some versions say the eye is the light into the soul... that you can see the spirit within someone by looking at their eyes..

I tend to think it isn't really meaning anything that literal.. I think it means more about our heart... that our heart is filled with darkness.. then we too are filled with darkness.. but if our heart is filled with Christ.. with His love and His word.. then we tend to radiate that from within us...

 

I don't think you can be miserable on the inside... yet be pleasant on the outside... at least not long term.. you can fool some of the people some of the time.. but you cannot fool all of the people all of the time.. who you really are within shows itself... I believe anyone without Christ is miserable inside.. you have no light.. nothing to bring true joy... you may not have problems with money.. you may have people who really love you.. but without Christ.. there is no joy.. no true peace... and that shows itself... eventually...