Revelation
King James Version (KJV)

“And unto the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead.”
King James Version (KJV)
3:1 The seven spirits of God - The Holy Spirit, from whom alone all spiritual life and strength proceed. And the seven stars - which are subordinate to him. Thou hast a name that thou livest - A fair reputation, a goodly outside appearance. But that Spirit seeth through all things, and every empty appearance vanishes before him.
Re 3:1 The Epistles to the Seven Churches Continued SUMMARY OF REVELATION 3: Letter to the Church at Sardis, the Spiritually Dead Church. Letter to the Tried and Faithful Church of Philadelphia. Letter to the Lukewarm Church of Laodicea. THE CHURCH AT SARDIS The church in Sardis. The city of Sardis, once the capital of the great kingdom of Lydia and the home of Croesus, the rich king, lay in the interior nearly a hundred miles east of Smyrna and Ephesus. Though it had lost its former greatness it was still a considerable city in the first century. The church there was planted, no doubt, by some of the companions of Paul. The former city has now ceased to exist, and only extensive ruins remain to testify of its greatness. Like the church at Ephesus, which had lost its first love, the Sardian church which had "a name to live and was dead", has had its lampstand removed for many centuries. He that hath the seven Spirits of God. See notes on Re 1:4,16. The perfect number seven denotes fulness. He hath the fulness of the Spirit whom he sends into the earth to do his work. Thou hast a name that thou livest, and art dead. Though nominally Christian and living the Christian life, they were really spiritually dead.