Yes, I TOTALLY believe that the eyes are the windows to the soul, because I knew someone in high school who helped me to see His joy in her life and I could also see that joy in her eyes as well. Just that light in people's eyes or darkness in people's eyes can tell a lot.  I have also seen a fake type of light in people eyes (who I knew what religion they were in) and it just felt like there's just this deceitfulness in it. Good lights and bad lights also, just like good spirits and bad spirits. Which I know there are both of those, also.