Revelation 3:2-4

Wake up! Strengthen what you have left before it dies completely. I have found that what you are doing is less than what my God wants. So do not forget what you have received and heard. Obey it, and change your hearts and lives. So you must wake up, or I will come like a thief, and you will not know when I will come to you. But you have a few there in Sardis who have kept their clothes unstained, so they will walk with me and will wear white clothes, because they are worthy.