Lift up your voice like a trumpet and show this people their transgression. Open up the moral Law to bring the knowledge of sin (see Rom. 3:19,20; 7:7; 7:13), then preach that Christ has redeemed us from the curse of the Law, having become a curse for us, and that God commands all men everywhere to repent, because He has appointed a day on which He will judge the world in righteousness (see Acts 17:30,31).
Matthew 5:14 You are the light of the world. A city that is set on a hill cannot be hidden.