“You are the light of the world. A city set on a hill cannot be hidden; nor does anyone light a lamp and put it under a basket, but on the lamp stand and it will give light to all who are in the house. Let your light shine before men in such a way that they may see your good works, and glorify your Father who is in heaven.” Matthew 5:14-16
Or in lament’s terms, set a good example by being the light that outshines the darkness and other’s will begin to follow.