In this lesson, Dr. Bramson teaches about the church of Philadelphia. What does it mean by “keys of David” and “open door?” To answer these questions, Dr. Bramson looksto the Old Testament as well as to a discussion of how we are saved. Can we lose our salvation, as some denominations teach? What denominations believe that they are Jews? What is the big deal if you believe that you are a Jew but really aren’t? What warning did Jesus give to these people? What promise is given to those in the church of Philadelphia concerning the Great Tribulation?