Faith is a “light” to illuminate our path toward God in the same way that a flashlight is a means to show the way home.
This is probably why the imagery of light and illumination can be found in all major religions. It is where creation itself began: “let there be light.”
But for us Christians, the principle is a person–Jesus, the Light of the world. Our search for God is not essentially philosophical, it is personal. It is “I-Thou,” not “I-It.” We can use the image of light to have dialogue with people of various faiths, but our witness is to him who said, “I am the Light.”
The light of faith becomes a means of showing the way, again for Christians, focused in Jesus who said, “I am the way.” Faith turns wanderers into pilgrims–men and women who naturally long for God (Genesis 1:26-28) and who are on a journey towards the God who wants to be found–in fact, toward the God who comes to us in the midst of our search, not leaving our finding of Him to chance.