“And to the angel of the church in Philadelphia write, ‘These things says He who is holy, He who is true, He who has the key of David, He who opens and no one shuts, and shuts and no one opens (1): I know your works (2). See, I have set before you an open door (3), and no one can shut it; for you have a little strength (4), have kept My word (5), and have not denied My name (6). Indeed, I will make those of the synagogue of Satan (7), who say they are Jews and are not, but lie—indeed I will make them come and worship before your feet, and to know that I have loved you. Because you have kept My command to persevere (8), I also will keep you from the hour of trial which shall come upon the whole world (9), to test those who dwell on the earth. Behold, I am coming quickly! Hold fast what you have, so that no one may take your crown. He who overcomes (10), I will make him a pillar in the temple of My God, and he shall go out no more. I will write on him the name of My God and the name of the city of My God, the New Jerusalem, which comes down out of heaven from My God. And I will write on him My new name (11). He who has an ear, let him hear what the Spirit says to the churches (12).”’” Revelation 3:7-13

1) Isaiah prophesied about Jesus Christ.
The key of the house of David I will lay on his shoulder; So, he shall open, and no one shall shut; And he shall shut, and no one shall open. Isaiah 22:22

2) Believers’ good works will glorify God.
“You are the light of the world. A city that is set on a hill cannot be hidden. Nor do they light a lamp and put it under a basket, but on a lampstand, and it gives light to all who are in the house. Let your light so shine before men, that they may see your good works and glorify your Father in heaven.” Matthew 5:14-16

3) Jesus Christ is the door to salvation.
Then Jesus said to them again, “Most assuredly, I say to you, I am the door of the sheep. All who ever came before Me are thieves and robbers, but the sheep did not hear them. I am the door. If anyone enters by Me, he will be saved and will go in and out and find pasture.” John 10:7-9

4) Believers will be strengthened in the knowledge of God.
For this reason we also, since the day we heard it, do not cease to pray for you, and to ask that you may be filled with the knowledge of His will in all wisdom and spiritual understanding; that you may walk worthy of the Lord, fully pleasing Him, being fruitful in every good work and increasing in the knowledge of God; strengthened with all might, according to His glorious power, for all patience and longsuffering with joy; giving thanks to the Father who has qualified us to be partakers of the inheritance of the saints in the light. Colossians 1:9-12

5) Believers will love Jesus Christ.
Jesus answered and said to him, “If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him.” John 14:23

6) Believers will not deny Jesus Christ.
Who is a liar but he who denies that Jesus is the Christ? He is antichrist who denies the Father and the Son. Whoever denies the Son does not have the Father either; he who acknowledges the Son has the Father also. 1 John 2:22-23

7) Synagogues were centers of unbelief.
“Behold, I send you out as sheep in the midst of wolves. Therefore, be wise as serpents and harmless as doves. But beware of men, for they will deliver you up to councils and scourge you in their synagogues.” Matthew 10:16-17

8) Believers will persevere through tribulation.
Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ, through whom also we have access by faith into this grace in which we stand, and rejoice in hope of the glory of God. And not only that, but we also glory in tribulations, knowing that tribulation produces perseverance; and perseverance, character; and character, hope. Now hope does not disappoint, because the love of God has been poured out in our hearts by the Holy Spirit who was given to us. Romans 5:1-5

9) Jesus Christ will keep believers from the wrath of God.
But let us who are of the day be sober, putting on the breastplate of faith and love, and as a helmet the hope of salvation. For God did not appoint us to wrath, but to obtain salvation through our Lord Jesus Christ, who died for us, that whether we wake or sleep, we should live together with Him. 1 Thessalonians 5:8-10

10) Believers overcome the world through faith in Jesus Christ.
Whoever believes that Jesus is the Christ is born of God, and everyone who loves Him who begot also loves him who is begotten of Him. By this we know that we love the children of God, when we love God and keep His commandments. For this is the love of God, that we keep His commandments. And His commandments are not burdensome. For whatever is born of God overcomes the world. And this is the victory that has overcome the world—our faith. Who is he who overcomes the world, but he who believes that Jesus is the Son of God? 1 John 5:1-5

11) The new name of Jesus Christ will be “Yahweh Our Righteousness”.
“Behold, the days are coming,” says the LORD, “That I will raise to David a Branch of righteousness; A King shall reign and prosper, and execute judgment and righteousness in the earth. In His days Judah will be saved, and Israel will dwell safely; Now this is His name by which He will be called: THE LORD OUR RIGHTEOUSNESS.” Jeremiah 23:5-6

12) There is no one true organized church.