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2Awake, and strengthen what remains and is on the point of death, for I have not found your works perfect in the sight of my God. 3Remember then what you received and heard; keep that, and repent. If you will not awake, I will come like a thief, and you will not know at what hour I will come upon you. 4Yet you have still a few names in Sardis, people who have not soiled their garments; and they shall walk with me in white, for they are worthy. 5He who conquers shall be clad thus in white garments, and I will not blot his name out of the book of life; I will confess his name before my Father and before his angels. 6He who has an ear, let him hear what the Spirit says to the churches.'
Revelation 3:1-6 (RSV)