34 “Your eye is like a lamp that provides light for your body. When your eye is healthy, your whole body is filled with light. But when it is unhealthy, your body is filled with darkness. 35 Make sure that the light you think you have is not actually darkness. 36 If you are filled with light, with no dark corners, then your whole life will be radiant, as though a floodlight were filling you with light.” (Luke 11 33-36 NLT)
Lights are not all the same. Full spectrum lights can reveal anything that we can see with our human eyes. But other lights can be used to filter out one or more colors. A laser light pointed at a TV screen disappears.
There are times when people use the light of their own logic or the light of a changing culture to keep people from seeing God's light. Some false lights filter out God's Law. Others dismiss the Gospel. Still more try to hide God completely.
But Christians not only see God's light, we live in that light. God created light on the first day of creation. Jesus is the Light of the Word. The light of God's Law reveals our sins. The Gospel light reveals the Savior. We need the right light.