The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light. But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness! (Matthew 6:22-23)
Seraph, from a 14th C. marble sarcophagus. Seraphim are celestial beings of the first hierachy of Angels, with six wings and fiery-red in appearance. This hierachy surrounded God in perpetual adoration.