Revelation 3:2-3

Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.

Remember therefore how thou hast received and heard, and hold fast, and repent. If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.

Why should Sardis be watchful? Because their own city had already learned that lesson the hard way. Sardis fell when the people were not watching. They felt safe. They thought they were secure. They assumed no one could touch them. And now Jesus reaches back into their own history and says, in essence, You of all people should know better.

That is the danger of false security. A person can be so sure he is standing that he never thinks to watch. He can become haughty, settled, and self satisfied. He can say, We are on solid ground. No one is going to shake us. But that kind of confidence can be deadly when it is confidence in self, confidence in reputation, or confidence in the past instead of dependence on the Lord.

So Jesus says, Be watchful.

Then He adds, strengthen the things which remain, that are ready to die. I like that because even in a dead church, Jesus still sees what little life is left. He does not say there is nothing left at all. He points to what remains and urges them to strengthen it before it slips away entirely. That is mercy. That is the heart of the Lord. Even when a church is weak, even when it has drifted terribly far, He still calls it back before the final ember goes out.

Then comes the reason. “For I have not found thy works perfect before God.” In other words, what looked complete to men was not complete in the sight of heaven. Sardis may have had organization, name recognition, and outward order, but the Lord saw through it all. He saw that the work was unfinished because the life of God was missing.

Then Jesus tells them exactly what to do. Remember therefore how thou hast received and heard, and hold fast, and repent.

What had they received in the beginning? They had received the Word. They had received the Scriptures freshly opened again through men like Wycliffe, Calvin, Knox, and Luther. They had received the truth of justification by faith. They had received the Bible back into the hands of ordinary people. They had heard the voice of God cutting through layers of tradition and calling the church back to the foundation.

Jesus is saying, Remember that. Go back to that. Hold fast to that. Repent because you have drifted so far from the simplicity and strength of what was first given to you.

That word still lands hard. It is possible to inherit a mighty beginning and yet end up far from it. It is possible to be born in revival and die in routine. It is possible to receive truth with joy in one generation and then watch another generation treat it as nothing more than a museum piece.

And that is where the warning becomes sharp. When people who were given so much light begin to toy with unbelief, the fall is severe. There is something especially tragic about those who had the Word opened to them, who had the gospel clarified to them, and yet begin to undercut the very sayings of Jesus Himself. That kind of liberal theology does not merely weaken the church. It muddies the clearest truths Christ ever spoke and leaves people confused about the very words that were meant to give them life.

Think about that. The Roman system brought bloodshed, corruption, and immorality. That was terrible. But when people who claim to stand in the stream of the Reformation begin eroding confidence in Scripture itself, they attack the foundation. They do not merely abuse authority. They undermine truth. And when truth is blurred, the people are left with no sure ground beneath their feet.

That is why Jesus says, Hold fast, and repent.

Come back to what you received.
Come back to what you heard.
Come back to the Word.
Come back to the gospel.
Come back to the Christ who still speaks with clarity and authority.

Then comes the warning. “If therefore thou shalt not watch, I will come on thee as a thief, and thou shalt not know what hour I will come upon thee.” Sardis, the city that once fell because it was not watching, is told that the same thing can happen spiritually. The fall will come suddenly. The exposure will come unexpectedly. The Lord will deal with them in an hour they did not anticipate because they would not stay awake.

And I think there is more in that phrase than merely sudden judgment. It also points to how the coming of the Lord will catch the unwatchful off guard. The language of coming as a thief speaks of unexpected arrival. A thief does not announce himself. He comes suddenly, quietly, at an hour people are not expecting. So too, those who are not watching for the Lord, not living in readiness, not holding fast to His Word, will be overtaken in surprise. That is why this verse carries such weight in connection with the rapture. Those who are spiritually asleep, resting in reputation and routine, will be caught off guard. Sardis had a name, but they were not watching. And Jesus warns them that if they stay in that condition, His coming will overtake them in a way they did not anticipate.

Beloved, this speaks loudly even now. We cannot live on yesterday’s victories. We cannot lean on the faithfulness of reformers while neglecting the Word they fought to recover. We cannot boast in our heritage and then treat the Bible as negotiable. We must watch. We must strengthen what remains. We must remember what we have received and heard. And we must hold fast to it with all our hearts.

Because a church that stops watching is already in danger of falling.