Jesus is holy, true, and has all authority. The church in Philadelphia has simply responded to who Jesus is and what He has done, and now Jesus promises to take care of them forever.

Jesus had nothing good to say about the church in Sardis, they looked good from the outside, but were dying within. Unfortunately, we can be same way.

In the letter to the church at Thyatira we find an admonition not just to do well, but to finish well too.