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.
ExplanationCommentary
Verse 34. If thy eye be single. As when the eyes of the body are pure, and free from the mixture of bad humours, the whole body is lightsome; so if the eyes of the mind, that is reason, faith and understanding, are not infected with the pestiferous humours of envy, avarice, and other vices, the whole mind will be illuminated by the presence of the Holy Ghost. Take care, therefore, lest by giving way to these vices, the light which is in thee be turned into darkness. Barradius.