Revelation 3:1-6 is a message from Jesus to the church in Sardis. In this passage, Jesus condemns the church for its spiritual deadness, despite its reputation for being alive. He tells them that their deeds are unfinished and urges them to wake up, strengthen what remains, and repent. He warns that if they do not wake up, He will come like a thief, unexpectedly, and they will not be prepared. However, Jesus also acknowledges a few faithful individuals in Sardis who have remained true, and He promises them that they will walk with Him, dressed in white, symbolizing purity and righteousness. The passage concludes with a call to hear and respond to the message, emphasizing the importance of overcoming and remaining faithful.