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 3:19-21

 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 10:11

 ¹¹ Then they said to me, “You must prophesy again about many peoples and nations and languages and kings.”

 

Revelation 12: 15-16

  ¹⁵ Then from his mouth the serpent spewed water like a river, to overtake the woman and sweep her away with the torrent. ¹⁶ But the earth helped the woman by opening its mouth and swallowing the river that the dragon had spewed out of his mouth. 

 

From these verses it's clear that the devil tries everything in his power to destroy the church, represented by the female figure in these verses, (either Israel or Christianity or symbolic of both). This includes trying to kill her infant son, Jesus, whom God took into the safety of heaven.