Luke 11:34

ὁ λύχνος, etc., the lamp of the body is thine eye. This thought in connection with the foregoing one might lead us to expect some remark on the proper placing of the body's lamp, but the discourse proceeds to speak of the single (ἁπλοῦς) and the evil (πονηρὸς) eye. The connection lies in the effects of these qualities. The single eye, like a properly placed lamp, gives light; the evil eye, like a lamp under a bushel, leaves one in darkness. On these attributes of the eye vide remarks on Matthew 6:22-23.