“Write this letter to the angel of the church in Philadelphia. This is the message from the one who is holy and true, the one who has the key of David. What he opens, no one can close; and what he closes, no one can open.” Revelation 3:7
Holiness and truth go hand in hand. When we don’t walk in truth, we will not be manifesting holiness. When we don’t apply truth to our lives, we will not understand the purposes of God. David is synonymous with the Kingdom. God made a covenant with David. (2 Samuel 7) ‘The one who opens” – True believers have eternal security. True believers want holiness and truth. There is an eternal nature to this covenant. The promise of the gospel is that we have eternal life. When God saves, it is an eternal salvation. It won’t be opened for them who reject God and His truth.
Christ is also presented as the One who has the key of David, the One that opens in such a way that no man can shut, and the One who shuts so that no man can open. The description of Christ as He is introduced to the Philadelphian church is less similar to the vision of Christ in chapter 1 than any of the other presentations to the seven churches. He is declared in 1:18 to “have the keys of hell and of death.” Here the allusion seems to be in. “I will give him the key to the house of David—the highest position in the royal court. When he opens doors, no one will be able to close them; when he closes doors, no one will be able to open them.” (Isaiah 22:22) To the church at Philadelphia surrounded by heathendom and wickedness, Christ gives assurance that He has power to open and close according to His sovereign will.