Revelation 1:1-3

1 The revelation from Jesus Christ, which God gave Him to show His servants what must soon take place. He made it known by sending his angel to his servant John, ² who testifies to everything he saw—that is, the word of God and the testimony of Jesus Christ. ³ Blessed is the one who reads aloud the words of this prophecy, and blessed are those who hear it and take to heart what is written in it, because the time is near.

Revelation 1:4-6

 ⁴ John to the seven churches which are in Asia: Grace be unto you, and peace, from him which is, and which was, and which is to come; and from the seven Spirits which are before his throne;

⁵ And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood,

⁶ And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.

Revelation 1:10 -13

¹⁰ On the Lord’s Day I was in the Spirit, and I heard behind me a loud voice like a trumpet, ¹¹ which said: “Write on a scroll what you see and send it to the seven churches: to Ephesus, Smyrna, Pergamum, Thyatira, Sardis, Philadelphia and Laodicea.” ¹² I turned around to see the voice that was speaking to me. And when I turned I saw seven golden lampstands, ¹³ and among the lampstands was someone like a son of man, dressed in a robe reaching down to his feet and with a golden sash around his chest.

Revelation 1: 17-18

^{17 "}When I saw him, I fell at his feet as though dead. Then he placed his right hand on me and said: “Do not be afraid. I am the First and the Last. ¹⁸ I am the Living One; I was dead, and now look, I am alive for ever and ever! And I hold the keys of death and Hades." 

One can only imagine the feeling John must have had at this point being confronted with all this overwhelming sound and imagery, but Christ is quick to comfort him and tell him not to be afraid.

Revelation 1:19-20

¹⁹ “Write, therefore, what you have seen, what is now and what will take place later. ²⁰ The mystery of the seven stars that you saw in my right hand and of the seven golden lampstands is this: The seven stars are the angels of the seven churches, and the seven lampstands are the seven churches."

In these verses Jesus makes it clear what the seven lampstands and the seven angels were referring to earlier. One source I found suggested that the word angel could also be translated as messenger, so that the verse may reference human pastors or disciples. 

Revelation 2: 11-13

 ^{11 "}Whoever has ears, let them hear what the Spirit says to the churches. The one who is victorious will not be hurt at all by the second death.

¹² “To the angel of the church in Pergamum write:

These are the words of him who has the sharp, double-edged sword. ¹³ I know where you live—where Satan has his throne. Yet you remain true to my name. You did not renounce your faith in me, not even in the days of Antipas, my faithful witness, who was put to death in your city—where Satan lives."

Revelation 2:14-17

 

¹⁴ "Nevertheless, I have a few things against you: There are some among you who hold to the teaching of Balaam, who taught Balak to entice the Israelites to sin so that they ate food sacrificed to idols and committed sexual immorality. ¹⁵ Likewise, you also have those who hold to the teaching of the Nicolaitans. ¹⁶ Repent therefore! Otherwise, I will soon come to you and will fight against them with the sword of my mouth.

¹⁷ Whoever has ears, let them hear what the Spirit says to the churches. To the one who is victorious, I will give some of the hidden manna. I will also give that person a white stone with a new name written on it, known only to the one who receives it."

Revelation 2: 18-21

 ¹⁸ “To the angel of the church in Thyatira write:

These are the words of the Son of God, whose eyes are like blazing fire and whose feet are like burnished bronze. ¹⁹ I know your deeds, your love and faith, your service and perseverance, and that you are now doing more than you did at first.

²⁰ Nevertheless, I have this against you: You tolerate the woman Jezebel, who calls herself a prophet. By her teaching she misleads my servants into sexual immorality and the eating of food sacrificed to idols. ²¹ I have given her time to repent of her immorality, but she is unwilling.

Revelation 2:26-29

²⁶ To the one who is victorious and does my will to the end, I will give authority over the nations— ²⁷ that one ‘will rule them with an iron scepter and will dash them to pieces like pottery’—just as I have received authority from my Father. ²⁸ I will also give that one the morning star. ²⁹ Whoever has ears, let them hear what the Spirit says to the churches.

Revelation 3: 1-3

 “To the angel of the church in Sardis write:

 These are the words of him who holds the seven spirits of God and the seven stars. I know your deeds; you have a reputation of being alive, but you are dead. ² Wake up! Strengthen what remains and is about to die, for I have found your deeds unfinished in the sight of my God. ³ Remember, therefore, what you have received and heard; hold it fast, and repent. But if you do not wake up, I will come like a thief, and you will not know at what time I will come to you.

 This link at davidschrock.com gives several interpretations about what Jesus may mean by "the seven spirits of God" in this verse, referencing verses of prophecy in Isaiah 11:1-5. The writer notes that the seven qualities in Isaiah 11:2 are described as the "sevenfold spirit of God".

Revelation 3: 4-6

 In Revelation chapter three, verses four through six, Jesus continues his admonition to the Church in Sardis. He says, 

"Yet you have a few people in Sardis who have not soiled their clothes. They will walk with me, dressed in white, for they are worthy. ⁵ The one who is victorious will, like them, be dressed in white. I will never blot out the name of that person from the book of life, but will acknowledge that name before my Father and his angels. ⁶ Whoever has ears, let them hear what the Spirit says to the churches."

This passage is pretty clear cut; here Jesus acknowledges that some members of the church at Sardis are still in good standing; he uses the metaphor of wearing white clothing to signify the remaining purity of their souls. He is telling the congregation that their deeds matter and to cling to his teachings and remain repentant until the day of his second coming so that their name will remain in the book of life. 

Revelation 3: 7-8

 Revelation chapter three, verses seven and eight, says: 

To the angel of the church in Philadelphia write:

These are the words of him who is holy and true, who holds the key of David. What he opens no one can shut, and what he shuts no one can open. I know your deeds. See, I have placed before you an open door that no one can shut. I know that you have little strength, yet you have kept my word and have not denied my name.

Revelation 3: 14-18

 “To the angel of the church in Laodicea write:

These are the words of the Amen, the faithful and true witness, the ruler of God’s creation. ¹⁵ I know your deeds, that you are neither cold nor hot. I wish you were either one or the other! ¹⁶ So, because you are lukewarm—neither hot nor cold—I am about to spit you out of my mouth. ¹⁷ You say, ‘I am rich; I have acquired wealth and do not need a thing.’ But you do not realize that you are wretched, pitiful, poor, blind and naked. ¹⁸ I counsel you to buy from me gold refined in the fire, so you can become rich; and white clothes to wear, so you can cover your shameful nakedness; and salve to put on your eyes, so you can see. 

 

There are still many ruins left standing at Laodicea; this article talks about both the ruins and the "lukewarm" parishioners of Laodicea who were trying to avoid being killed by the emperor Domitian for not worshipping him as emperor, as well as the imperial cult dynasties.

Revelation 3:19-21

 These are the last few verses of Revelation chapter three, which finishes Jesus' message to the church in Laodicea:

¹⁹ Those whom I love I rebuke and discipline. So be earnest and repent. ²⁰ Here I am! I stand at the door and knock. If anyone hears my voice and opens the door, I will come in and eat with that person, and they with me.

²¹ To the one who is victorious, I will give the right to sit with me on my throne, just as I was victorious and sat down with my Father on his throne. ²² Whoever has ears, let them hear what the Spirit says to the churches.”

 

Revelation 4:1-3

  

 "After this I looked, and there before me was a door standing open in heaven. And the voice I had first heard speaking to me like a trumpet said, “Come up here, and I will show you what must take place after this.” ² At once I was in the Spirit, and there before me was a throne in heaven with someone sitting on it. ³ And the one who sat there had the appearance of jasper and ruby. A rainbow that shone like an emerald encircled the throne."

 

Revelation 4: 4-6

"Around the throne are twenty-four thrones, and seated on the thrones are twenty-four elders, dressed in white robes, with golden crowns on their heads. ⁵ Coming from the throne are flashes of lightning, and rumblings and peals of thunder, and in front of the throne burn seven flaming torches, which are the seven spirits of God; ⁶ and in front of the throne there is something like a sea of glass, like crystal." 

 

Revelation 6: 12-17

 

¹² When he opened the sixth seal, I looked, and there came a great earthquake; the sun became black as sackcloth, the full moon became like blood, ¹³ and the stars of the sky fell to the earth as the fig tree drops its winter fruit when shaken by a gale. ¹⁴ The sky vanished like a scroll rolling itself up, and every mountain and island was removed from its place. 

  ¹⁵ Then the kings of the earth and the magnates and the generals and the rich and the powerful, and everyone, slave and free, hid in the caves and among the rocks of the mountains, ¹⁶ calling to the mountains and rocks, “Fall on us and hide us from the face of the one seated on the throne and from the wrath of the Lamb; ¹⁷ for the great day of their wrath has come, and who is able to stand?”

Revelation 12:5

  ⁵ "And she gave birth to a son, a male child, who is to rule all the nations with a rod of iron. But her child was snatched away and taken to God and to his throne..."

All the writers I read on this chapter agree that this male child referenced above that the woman gives birth to is Jesus Christ. The woman, the mother of the male child, is seen as either the country of Israel or the Mary the mother of Christ or possibly symbolic of both.

Revelation 12:9

 ⁹ The great dragon was thrown down, that ancient serpent, who is called the Devil and Satan, the deceiver of the whole world—he was thrown down to the earth, and his angels were thrown down with him.

After God protects Christ by calling Him up to Heaven, and nourishes the Church/Israel (symbolized by the woman with the crown of stars) as she wanders in the wilderness, he casts Satan out of the heavens. The compatriots who plotted alongside of the devil to challenge God, referred to above as 'his' angels, are also thrown down to earth, as the prior verses say there is no place for them in Heaven any longer.