Read Luke 11:33-36 (NIV)
"No one lights a lamp and puts it in a place where it will be hidden, or under a bowl. Instead he puts it on its stand, so that those who come in may see the light. 34Your eye is the lamp of your body. When your eyes are good, your whole body also is full of light. But when they are bad, your body also is full of darkness. 35See to it, then, that the light within you is not darkness. 36Therefore, if your whole...