Luke 11:34

34Theὁlampλύχνοςof yourτοῦbodyσώματόςisἐστινtheὁeyeὀφθαλμόςof youσου.Whenὅτανtheὁeyeὀφθαλμόςof youσουclearἁπλοῦςisᾖ,alsoκαὶallὅλονtheτὸbodyσῶμάof youσουlightφωτεινόνisἐστιν·whenἐπὰνhoweverδὲevilπονηρὸςit beᾖ,alsoκαὶtheτὸbodyσῶμάof youσου[is] darkσκοτεινόν.

The lamp of the body is your eye. When your eye may be sound, also your whole body is full of light; but when it may be evil, your body [is] also full of darkness.