This subject is concealed to most and is a hard nut to crack. I have a version that IMO makes some sense, although it can be improved.
I still have a difficulty that believers have the key or copies of the key of David. Jesus is the true key opener or closer of the entrance to our hearts. If assisting in the work of Jesus to bring others to the Kingdom then we are using a different type of key as in the preaching of the gospel etc.
The key of David is derived from the physical conquest, by David, of Zion. The conquest of physical Zion was accomplished by having the right key to open the gate from the inside of the city walls, for his men to conquer it. He brought in the men of God and depleted the evil ones, to inhabit it, desired ultimately by God.
For today, Jesus now has the control and authority from God to possess the key of David. Jesus has the key to unlock or keep locked the hearts (the inner person - hearts) of mankind - to stay dead in their sins. Jesus can unlock our natural hearts, so it can be flooded with his spirit and character, to become ‘in him’ as believer; to be part of the Kingdom. He can also keep locked out natural heart from those that his Father wants to remain locked. The Father’ desire is the ‘key.’ Jesus is the worker and conqueror as was David to bring us in his spirit and directly in righteousness with and to God, in his presence and peace.
Believers today, as with the apostles also act as one with Jesus to open and keep closed the hearts of men. If the Father desires a person to be converted into the Kingdom, then we can become catalysts, in the service of Jesus, to assist in Jesus opening or keeping locked these hearts for God our Father. The disciples and the apostles were told they had the power to forgive sin - save or keep folks in sin by preaching the gospel to some and not others. And yes, Matt 16:19 also applies here.
I must emphasis two things:
1. That Jesus is the only one that retains control of the key of David.
2. We cannot act on our own, or decide when we feel like to assist Jesus and the Father for the purpose of the Kingdom. Jesus has this authority and ownership of the key of David.
Well this is my rendition…this is a tough subject indeed.
Blessings,
APAK