John was writing to the Church in Sardis…but he could be addressing the Church today in general. When he says, “Wake up!”, John is speaking not of just physically waking up and throwing off our lackadaisical Christianity…but of waking up morally and realizing we have been compromising our faith away. John was talking about comfortable or lazy Christianity…we’re saved and satisfied…but all the while the rest of the world outside is dying and going to Hell.