Revelation 3:1: “And unto the angel” [Messenger/leader] “of the church in Sardis write; These things saith he" [Christ] "that hath the seven Spirits of God, and the seven stars;” [See Revelation 1:16] “I know thy works, that thou hast a name that thou livest, and art dead.”
Revelation 3:2: “Be watchful, and strengthen the things" [Those in the church of Sardis] "which remain," [In Christ] "that are ready to die: for I have not found thy works perfect before God.”
Revelation 3:3: “Remember therefore how thou hast received and heard," [The gospel of Christ] "and hold fast, and repent." [See Hebrews 10:32-38] "If therefore thou” [The leader of the church of Sardis] “shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.” See Mark 13:34-37 and Matthew 24:48-51.
Revelation 3:4: “Thou hast a few names even in Sardis which have not defiled their garments; and they shall walk with me in white: for they are worthy.”