“To the angel of the church in Sardis write:
These are the words of him who holds the seven spirits of God and the seven stars. I know your deeds; you have a reputation of being alive, but you are dead. 2 Wake up! Strengthen what remains and is about to die, for I have found your deeds unfinished in the sight of my God. 3 Remember, therefore, what you have received and heard; hold it fast, and repent. But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you.
This link at davidschrock.com gives several interpretations about what Jesus may mean by "the seven spirits of God" in this verse, referencing verses of prophecy in Isaiah 11:1-5. The writer notes that the seven qualities in Isaiah 11:2 are described as the "sevenfold spirit of God".
In verse two Jesus chides the church in Sardis for resting on its laurels, for having a reputation for being more committed to Christ and spreading the Gospel than it truly was. He implies that they are dialing in their commitment to Him rather than being alive with love for him. Bibleref.com gives a more detailed interpretation of this verse here: link.
Jesus asks the church in verse three to reestablish their gratitude for the Salvation they have received from Him. He tells them to repent of their sins that they have committed and to recommit their lives to serving Him. He reminds them that He will come like a thief in the night and they will have no warning of His second coming before it happens.
If you want to accept Salvation from Christ here are some resources:
A Prayer for Salvation from Christ:
Lord
Jesus, I confess my sins and ask for your forgiveness. Please come into
my heart as my Lord and Savior. Take complete control of my life and
help me to walk in Your footsteps daily by the power of the Holy Spirit.
Thank you Lord for saving me and for answering my prayer.
A more detailed step by step process:
https://www.wikihow.com/Accept-Jesus-Into-Your-Life
