Luke 11:33

No one, when he has lit a lamp, puts it in a secret place or under a basket, but on a lampstand, that those who come in may see the light.

The hurting and lost in the world need a light.  The lost of this world need genuine and caring people to show them what Love looks and acts like.  They need us to know God and what He represents and if we act like Him they will see Love in action.  We are watched by people more than we think. They wonder what makes our lives better and different and that is God showing through us.  Jesus showed people the possible in the impossible, He was a lamp in the darkness.