Letter to the Church in Philadelphia

1. The author of Rev 3:7-13 is described as the holy one, the true one, and the holder of the key of David.
What are the significance of these terms?

2. What do "open door" mean to you? Do you think you need to do anything about the open door?

3. In verses 11 and 12, what are believers encouraged to do? What rewards are promised them?