Luke 11:33-36 - Light And Darkness
33 No one lights a candle and puts it in a secret place, or under a modius [1.916 gallon measure], but on a candlestick, that all who go in may see the light. 34 The light of the body is the eye; when, therefore, your eye is sound, your whole body is light; but when your eye is evil, your whole body is dark. 35 See, therefore, that the light which is in you be not darkness. 36 If, therefore, your whole body is light, not having any part dark, the whole will be light, as when a candle lights you clearly.