Revelation 3:1-6 “To the angel of the church in Sardis write: He who has the seven Spirits of God and the seven stars, says this: “I know your deeds, that you have a name that you are alive,but you are dead. 2 WAKE UP, and strengthen the things that remain, which were about to die; for I have NOT found your deeds completed in the sight of My God. 3 So remember what you have received and heard; and keep it, and REPENT. Therefore if you do not WAKE UP, I will COME LIKE A THIEF, and you will not know at what hour I will come to you. 4 But you have a few people in Sardis who have not soiled their garments; and they will walk with Me in white, for they are worthy. 5He who overcomes will thus be clothed in white garments; and I will NOT erase his name from the book of life, and I will confess his name before My Father and before His angels. 6 He who has an ear, let him hear what the Spirit says to the churches.’

Here, we read that Jesus quickly and clearly condemns the lifeless state of the Sardian church: He says; “I know your deeds; you have a reputation of being alive, but you are dead” (Revelation 3). This church may have had a good reputation, but they were spiritually lifeless. In other words, the church was filled with unsaved people going through the motions of religion. There were many tares among the wheat (Matthew 13:24-30).