Revelation 3:2-4

Wake up and strengthen all that remains before it dies, for I haven’t found your works to be perfect in the sight of my God. So remember all the things you’ve received and heard, then turn back to God and obey them. For if you continue to slumber, I will come to you like a thief, and you’ll have no idea at what hour I will come. 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.