“And to the angel of the church in Philadelphia write: ‘The words of the holy one, the true one, who has the key of David, who opens and no one shall shut, who shuts and no one opens.”‘I know your works. Behold, I have set before you an open door, which no one is able to shut; I know that you have but little power, and yet you have kept my word and have not denied my name. Behold, I will make those of the synagogue of Satan who say that they are Jews and are not, but lie–behold, I will make them come and bow down before your feet, and learn that I have loved you. Because you have kept my word of patient endurance, I will keep you from the hour of trial which is coming on the whole world, to try those who dwell upon the earth. I am coming soon; hold fast what you have, so that no one may seize your crown. He who conquers, I will make him a pillar in the temple of my God; never shall he go out of it, and I will write on him the name of my God, and the name of the city of my God, the new Jerusalem which comes down from my God out of heaven, and my own new name. He who has an ear, let him hear what the Spirit says to the churches.’
–Revelation 3:7-13