Revelation 3:4-7

Yet there are still a few in Sardis who have remained pure, and they will walk in fellowship with me in brilliant light, for they are worthy. And the one who experiences victory will be dressed in white robes and I will never, no never erase your name from the Book of Life. I will acknowledge your name before my Father and his angels. So the one whose heart is open let him listen carefully to what the Spirit is now saying to all the churches. Write the following to the messenger of the congregation in Philadelphia, for these are the solemn words of the Holy One, the true one, who has David’s key, who opens doors that none can shut and who closes doors that none can open