And unto the angel of the church in Sardis write; These things says he that has the seven Spirits of God, and the seven stars; I know your works, that you have a name that you live, and are dead. Be watchful, and strengthen the things which remain, that are ready to die: for I have not found your works perfect before God. Remember therefore how you have received and heard, and hold fast, and repent.

If therefore you will not watch, I will come on you as a thief, and you will not know what hour I will come upon you. You have a few names even in Sardis who have not defiled their garments; and they shall walk with me in white: for they are worthy. He that overcomes, the same shall be clothed in white clothing; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels. He that has an ear, let him hear what the Spirit says unto the churches. (Revelation 3:1-6)