The light of the body is the eye: if therefore your eye be sound, your whole body shall be full of light.
All Commentaries on Matthew 6:22 Go To Matthew 6
Theophylact of Ochrid
AD 1107
This means, if you fill your mind with worries over money, you have extinguished the lamp and darkened your soul. Just as the eye that is sound, or "healthy" brings light to the body, and the eye that is evil, or "diseased" brings darkness, so also does the state of the mind affect the soul. If the mind is blinded by these worries, it is cast into darkness; then the soul becomes dark, and how much more so the body as well?
