1. Strengthen what remains (1-3)
The church in Sardis looked spiritually alive--but it was dead. When one lives in the sight of men rather than in the sight of God, he is dead on the inside, even though he maintains a facade of false spirituality. The Lord commands them and us to wake up--to repent and strengthen the faith we have by remembering God's grace and by studying and obeying his word. Time is running out, for Jesus will come unexpectedly, like a thief in the night.
2. A few who walk with Jesus (4-6)
Even though the church in Sardis was full of deadness and superficiality, there was a faithful remnant who kept a pure love for Jesus in their hearts. Jesus promises that he will never blot them out of his book of life. They will walk with Jesus, dressed in white. They are those who live by faith and overcome the world.
Application: Lord, help me to wake up and walk with you and overcome the world.
One Word: Wake up and repent