"The eye is the lamp of the body. So, if your eye is sound, your whole body will be full of light; but if your eye is not sound, your whole body will be full of darkness. If then the light in you is darkness, how great is the darkness." Matt-6: 22-23It's been said that the eyes are the window of the soul. If that's the case then one's eyes are an important indicator of one's spiritual and physical state. You are what you consistently look at.
If you look at members of the opposite sex lustfully what does it say about your soul?
If you are always looking at the latest gadgets, clothing, or vehicles what does it say about your soul?
If you are constantly watching such programs as The Jersey Shore, The Wendy Williams Show,or MTV what does it say about your soul?
If you are constantly looking at your neighbor trying to find ways to judge them what does it say about your soul?
"The eye is the Lamp of the Body"
A well functioning lamp gives light to a person; it allows the person to see beyond the darkness. So if your light is functioning correctly you will not be overcome by the darkness. You will be able to get to your destination because of the light.
On a physical and spiritual level if the light within you is properly adjusted then chances are that your entire body is functioning correctly. What do I mean by this? A person living in sin typically lacks self control. The lustful person can't control his eyes, hands, or genitalia. The gluttonous person can't control his appetite while the angry person can't control his temper. The doubtful person can't control his doubt while the arrogant person can't control his arrogance. In all of these cases the light that is reflected is not light, but darkness. For light implies balance and moderation; darkness excess and disintegration. Taken to it's furthest extent darkness equals death. That's why Jesus stressed purity and custody of the senses (eyes) because as humans our wills are triggered by what we most focus on. Consistent focus equals habit. So if a person is constantly allowing sin to enter through the eyes chances are that those sinful images are triggering the will to act sinfully. Consistent, sinful focus thus becomes a habit and the person keeps on sinning without knowing it. Once a person has allowed sin to enter through the eyes it becomes very difficult to remove the sin since it has become a well ingrained habit.