We use lights as a metaphor for Christianity. A Christian should shine so brightly in his life, that a person could not live with him a week without knowing the gospel. His conversation should be such that all who are about him should clearly perceive whose he is; and should see the image of Jesus reflected in his daily actions.
Lights are intended for guidance. We are to help those around us who are in the dark. We are to hold forth to them the Word of life. We are to be a heavenly ladder to bring people to God, and the weary to a divine resting-place. Men sometimes read their Bibles, and fail to understand them; but we should be more alert, like Philip, to instruct the inquirer in the meaning of God's Word, the way of salvation, and the life of godliness.
Lights are also used for warning. On our rocks and shoals a light-house is sure to be erected. Christians should know that there are many false lights shown everywhere in the world, and therefore the right light is needed. The wreckers of Satan are always abroad, tempting the ungodly to sin under the name of pleasure; they hoist the wrong light, be it ours to put up the true light upon every dangerous rock, to guide people to something greater and use our lives preciously, shining as lights in the world.
Lights also have a very cheerful influence, and so have Christians. A Christian ought to be a comforter, with kind words on his lips, and sympathy in his heart; he should carry sunshine wherever he goes, and diffuse happiness around him.
Gracious Spirit dwell with me;
I myself would gracious be,
And with words that help and heal
Would thy life in mine reveal,
And with actions bold and meek
Would for Christ my Saviour speak.