the Pope
technically is Satan that is always trying to keep the Church divided but the papal institution is the main doctrine that keeps the Orthodox and Lutherans away from Catholicism
Why did Jesus quote Isaiah 22 in Matthew 16:18 - 19? What’s happening here? Well, in verse Isaiah 22: 19 it says, “I will thrust you from your office and you will be cast down from your station and on that day I will call my servant Eliakim, the son of Hilkiah, and I will clothe him with your robe and will bind your girdle on him and will commit your authority to his hand, and he shall be a father to the inhabitants of Jerusalem and to the House of Judah; and I will place on his shoulder the key of the House of David.”
Now the House of David is like, you know, the House of Bourbon. It’s a dynastic reference. The House of David is the Davidic kingdom, the Davidic dynasty. We know this because David has been dead for hundreds of years when this is happening in Isaiah 22, “I will give you the key of the House of David. He shall open and none shall shut, and he shall shut and none shall open. He will become a throne of honor to his father’s house.” Look at all of the symbols of dynastic authority that are being given to this individual. First of all, an office. Second, a robe. Third, a throne and fourth, keys, the key of the House of David, these royal keys.
Now, what is going on here? I’ll just summarize it in rather simple terms. Hezekiah was at the time, the king over Israel. He was the son of David, hundreds of years after David had died. He was in the line of David and also he was ruler over the House of David. Now all kings in the ancient world had, as kings and queens have these days, cabinet officers, a cabinet of royal ministers. Like Margaret Thatcher is the Prime Minister, so there are other ministers under the Queen in Great Britain. Hezekiah, as King, had as his Prime Minister before Shebna who proved unworthy. So he was expelled, but when he was expelled, he left an office vacant. Not only did you have dynastic succession for the king, but you also have a dynastic office for the Prime Minister. When Shebna is expelled, there is an empty office that needs to be filled and that’s why Eliakim is called to fill it.
Now, Eliakim is a minister in the cabinet, but now he is being granted the Prime Minister’s position. How do we know? Because he is given what the other ministers do not have, the keys of the kingdom, the key to the House of David. That symbolized dynastic authority entrusted to the Prime Minister and dynastic succession. Why? Because it’s the key of David; it’s the House of David.
Let me go back and try to simplify this even further. I’ll read the quote. In commenting upon Matthew 16 and Jesus giving to Peter the keys of the kingdom, Isaiah 22:15 and following undoubtedly lies behind this saying. The keys are the symbol of authority and same authority as that vested in the vicar, the master of the house, the chamberlain of the royal household of ancient Israel." In other words, the Prime Minister’s office. It’s why Catholics call the papacy the Petrine Ministry.