Joseph Garlington Jesus has called us to be light and to be salt. Light illuminates and rules the darkness, and salt affects everything it touches.
Salt also provokes thirst.
If you take the living Christ with you and begin to live among unsaved people, then sooner or later they will get really thirsty. Unfortunately, we don't act like it. All my life, the church taught me that friendship with the world is enmity with God, so I thought I couldn't have any friends who weren't Christians. We spent all our lives witnessing to Christians, and Sunday after Sunday, we thought we all needed to get saved again. Since none of us knew any sinners, we couldn't invite them to church and none of them got saved.