If God has provided a wonderful salvation through Christ as revealed in the Bible, how can anyone be sure that he has received Christ and is the beneficiary of this marvelous grace of God? The question of what one must do to be saved was asked long ago by the Philippian jailor in Acts 16:30. Paul and Silas had been beaten and thrown into prison in Philippi, with their feet fastened in the stocks. In this painful condition they could not sleep, so they sang praises to God. Scripture records that at......