“Why then is the devil—depression, oppression, demons, sickness, and everything else that is of the devil—ruling so many Christians and even churches?”
“It is because those believers do not know what belongs to them.

 

Romans 5:17 NKJV
For if by the one man’s offense death reigned through the one, much more those who receive abundance of grace and of the gift of righteousness will reign in life through the One, Jesus Christ. Weymouth’s translation says, “For if by the trespasses of the one, death reigned as king through the one,

1. No longer Under The Influence of The Enemy

Colossians 2:15 NKJV
Having disarmed principalities and powers, He made a public spectacle of them, triumphing over them in it.
The Phillips translation says, Jesus “. . . exposed them, shattered, empty and defeated, in his own triumphant victory!” The Rotherham translation says “Jesus “paralyzed”

HEBREWS 2:14 ASV
Since then the children are sharers in flesh and blood, He also Himself in like manner partook of the same; that through” “through death HE MIGHT BRING TO NOUGHT HIM THAT HAD THE POWER OF DEATH, that is, the devil.
Colossians 1:12–13 NKJV
giving thanks to the Father who has qualified us to be partakers of the inheritance of the saints in the light. 13 He has delivered us from the power [authority] of darkness and conveyed us into the kingdom of the Son of His love,

“Why then is the devil—depression, oppression, demons, sickness, and everything else that is of the devil—ruling so many Christians and even churches?”
“It is because those believers do not know what belongs to them.

Transitional Scripture:
Philippians 2:9–11 NKJV
Therefore God also has highly exalted Him and given Him the name which is above every name, 10 that at the name of Jesus every knee should bow, of those in heaven, and of those on earth, and of those under the earth, 11 and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father.

2. Ruling Through Christ Jesus

Romans 5:17 NKJV
For if by the one man’s offense death reigned through the one, much more those who receive abundance of grace and of the gift of righteousness will reign in life through the One, Jesus Christ.

Revelation 1:17–18 NKJV
And when I saw Him, I fell at His feet as dead. But He laid His right hand on me, saying to me, “Do not be afraid; I am the First and the Last. 18 I am He who lives, and was dead, and behold, I am alive forevermore. Amen. And I have the keys of Hades and of Death. The one who has the key is the authorized one. Jesus is saying here, “I am the authorized One.” He has authority.

There is nothing that the devil has that you cannot go in and get
Matthew 16:18–19 NKJV
And I also say to you that you are Peter, and on this rock I will build My church, and the gates of Hades shall not prevail against it. 19 And I will give you the keys of the kingdom of heaven, and whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.”

“But we have a conviction that before the Lord Jesus returns, there will be a mighty army of believers who will learn the secret of living in the Name, of reigning in life, living the victorious, transcendent, resurrection life of the Son of God among men.”
-E W Kenyon

3. Do you know what you have?

Acts 3:4–8 NKJV
And fixing his eyes on him, with John, Peter said, “Look at us.” 5 So he gave them his attention, expecting to receive something from them. 6 Then Peter said, “Silver and gold I do not have, but what I do have I give you: In the name of Jesus Christ of Nazareth, rise up and walk.” 7 And he took him by the right hand and lifted him up, and immediately
his feet and ankle bones received strength. 8 So he, leaping up, stood and walked and entered the temple with them—walking, leaping, and praising God.