Origen — as excerpted in the Catena Aurea on Luke 11:33-36

“That is, If thy material body, when the light of a candle shines upon it, is made full of light, so that not one of thy members is any longer in darkness; much more when thou sinnest not, shall thy whole spiritual body be so full of light, that its brightness may be compared to the shining of a candle, while the light which was in the body, and which used to be darkness, is directed whithersoever the understanding may command.”