Revelation 3:4-6

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.