The Eye Is the Lamp of the Body
What the eye seeks shapes the whole person.
Jesus uses the eye as a picture of desire and focus: a disordered gaze darkens the whole life.
Scripture
22 "The lamp of the body is the eye. If therefore your eye is sound, your whole body will be full of light.
23 But if your eye is evil, your whole body will be full of darkness. If therefore the light that is in you is darkness, how great is the darkness!
34 The lamp of the body is the eye. Therefore when your eye is good, your whole body is also full of light; but when it is evil, your body also is full of darkness.
35 Therefore see whether the light that is in you isn't darkness.
36 If therefore your whole body is full of light, having no part dark, it will be wholly full of light, as when the lamp with its bright shining gives you light."