“To the angel of the church in Philadelphia write: These are the Words of Him Who is Holy and True, Who holds the key of David. What He opens no one can shut, and what He shuts no one can open.”
Who is Holy and True
He Who is Holy as in the Old Testament is Jehovah, “the Holy One of Israel.” Thus Jesus and Jehovah, the God of the Old Testament are one. None but God is absolutely Holy(Greek, ἅγιος hagios, separate from evil) and True ( ἀληθινός alēthinos).
Who holds the key of David
This expression is taken from Isaiah 22:22, “And the key of the house of David will I lay upon his shoulder.” As used by Isaiah, the phrase is applied to Eliakim who was a ruler over the house of God in the times of Hezekiah. This man, by the character given him, was a good man, a faithful servant of the Lord. He was a type of Christ Who is the Son over God’s House.
“But Christ is faithful as a son over God's house. And we are his house, if we hold on to our courage and the hope of which we boast.” (Hebrew 3:6)
“Key” is the emblem of authority and knowledge; the key of David is the regal right or authority of David. David could shut or open the kingdom of Israel to whom he pleased. He was not bound to leave the kingdom even to his eldest son. He could choose whom he pleased to succeed him.
The Kingdom of the Gospel, and the Kingdom of Heaven, are at the disposal of Christ. He can shut against whom He will; He can open to whom He pleases. If He shuts, no man can open; if He opens, no man can shut. His determinations all stand fast, and none can reverse them.
Christ’s ruling as King of kings and Lord of lords is described to “reign David’s throne” in Isaiah 9:7;
“Of the increase of His government and peace there will be no end. He will reign on David's throne and over his kingdom, establishing and upholding it with justice and righteousness from that time on and forever. The zeal of the LORD Almighty will accomplish this.”
Lord Jesus, we eagerly await Your Kingdom on earth and want to see You reign on David’s throne forever and ever! Amen.