Many theologian's have question why only seven letters and why to these specific churches. While these were actual churches during John's time, Some believe that they also reflect the Christian church through-out history. If that's true, then this last letter depicts an apostate church which does fit in with the prophesies in the subsequent chapters of Revelation. Additionally, these seven churches I believe provide a cross cut example of all churches then and now. That is there are a number of churches can easily fit in the example of Philadelphia, Ephesus, Sardis, etc. now in current modern times and also back when these letters were penned. I believe these letters served a dual purpose, to warn all churches and exhort them to remember why we are here and paint a backdrop of how the Christian Church in general will go through different phases. Finally since churches are made of people, the warnings, exhortations need to be taken personally as well. After all if a church is apostate, that means its members are apostate as well.
Revelation 3:14-22
14 "To the angel of the church in Laodicea write:
"The Amen, the faithful and true Witness, the Originator of God's creation says: 15 I know your works, that you are neither cold nor hot. I wish that you were cold or hot. 16 So, because you are lukewarm, and neither hot nor cold, I am going to vomit you out of My mouth. 17 Because you say, 'I'm rich; I have become wealthy, and need nothing,' and you don't know that you are wretched, pitiful, poor, blind, and naked, 18 I advise you to buy from Me gold refined in the fire so that you may be rich, and white clothes so that you may be dressed and your shameful nakedness not be exposed, and ointment to spread on your eyes so that you may see. 19 As many as I love, I rebuke and discipline. So be committed and repent. 20 Listen! I stand at the door and knock. If anyone hears My voice and opens the door, I will come in to him and have dinner with him, and he with Me. 21 The victor: I will give him the right to sit with Me on My throne, just as I also won the victory and sat down with My Father on His throne.
22 "Anyone who has an ear should listen to what the Spirit says to the churches."
(HCSB)
The Destination:
The wealthy city of Laodicea was located on the road to Colosse about 40 miles southeast of Philadelphia. About 35 years before this letter was written, Laodicea was destroyed by an earthquake, but it had the wealth and ability to rebuild. Its main industry was wool cloth. There is no record that Paul ever visited this city, but he was concerned about it (Colossians 2:1-2; 4:16).
(from Bible Knowledge Commentary)
The Bible Knowledge commentary describes the city of Laodicea pretty accurately, a wealthy city that had within its own wherewithal the ability to rebuild itself after a devastating earthquake. The citizens were very rich indeed.
The Commendation:
NONE, the Laodicean letter offers no commendation. The creator of the universe, could not find one thing to praise the Laodicean church for. What an indictment and given that Jesus himself dictated this letter, it should have been a wakeup call to the church.
The Rebuke:
Jesus comes out swinging on this, the Christians within the city of Laodicea thought themselves rich and in need of nothing, but instead Jesus tells them they are pitiful, poor, blind and naked. He accuses them of being lukewarm. This figure of speech was particularly meaningful to the Laodiceans because their main water supply produced water that was lukewarm and I think everyone knows how refreshing lukewarm water is (or rather isn't) He even goes as far as saying he wants to spit them out.
The Exhortation:
Because of their worldly ways and being materialistic Jesus uses gold, and fine clothing to exhort them back into obedience. That is, ignore the temporary worldly riches and embrace the eternal riches being offered.
The Promise:
Jesus is at the door knocking, he will not enter the door of our heart but rather wait till he's invited. The promise is if we let him into our lives, repent of our sins we will have fellowship and eternal life with the creator but only if we invite Jesus into our lives. He will respect our wishes even if those wishes are rejecting his love and forgiveness.
I find that that Laodicean church to have more then a passing likeness to many churches in the US and its citizens as well. We in the US have long been accused of materialism, focusing more on making money then anything else. Only now as unemployment skyrockets and the stock market plunges are we hearing things that say spending, and the pursuit of possessions is wrong. I believe there were and are too many churches in America that are comfy, they have money, no needs, and feel they made it. Yet as with the letter to the Laodicean church they're not rich but wretchedly poor. When we trade our eternal blessings for the pursuit of money we transform what our lives from glorifying God to glorifying ourselves. Is it any wonder then that Jesus has some harsh words.
I think people forget that Christians will be judged, not for their sins, thanks to Jesus' payment on the cross of our transgressions but how we used his blessings, that is did we use our time, talents and treasures to further his kingdom, glorify him and build up the brethren or were they used to build bigger houses and fill them up with stuff.
1 Corinthians 3:12-15
If anyone builds on the foundation with gold, silver, costly stones, wood, hay, or straw, 13 each one's work will become obvious, for the day will disclose it, because it will be revealed by fire; the fire will test the quality of each one's work. 14 If anyone's work that he has built survives, he will receive a reward. 15 If anyone's work is burned up, it will be lost, but he will be saved; yet it will be like an escape through fire.
(HCSB)
How sad that many American Christians (and I include myself) will have their life work go up in smoke when judged. While our salvation is secure, they will have little to nothing to offer to Jesus. The health and wealth gospel has deluded so many people here, thinking that it is our right to have money and possessions yet we conveniently ignore Christians in other lands that are either actively being persecuted or are so poor that they barely have enough to eat.