"'Beware, the Lord is about to take firm hold of you and hurl you away, you mighty man. He will roll you up tightly like a ball and throw you into a large country. There you will die and there the chariots you were so proud of will become a disgrace to your master's house. I will depose you from your office, and you will be ousted from your position.'" NIV translation
Isaiah shares the judgment on one of the leaders of Judah. This reminds us that God is in control and that even includes so-called democratic elections. The "will of the people" does not override the will of God. When God wants to remove a leader, He can and will. We can rest assured that whoever is in positions of power is only there because of the fact that it fits into His overall plan for the world.
"'In that day I will summon my servant, Eliakim son of Hilkiah. I will clothe him with your robe and fasten your sash around him and hand your authority over to him. He will be a father to those who live in Jerusalem and to the people of Judah. I will place on his shoulder the key to the house of David; what he opens no one can shut, and what he shuts no one can open. I will drive him like a peg into a firm place; he will become a seat of honor for the house of his father. All the glory of his family shall hang on him; its offspring and offshoots - all its lesser vessels, from the bowls to all the jars.'" NIV translation
Isaiah speaks of a time when the people will return to Jerusalem from their captivity in Babylon.
During this time, Eliakim would be lifted up to replace Shebna.
It is a reminder that God was going to preserve a remnant of His people and they would have a new leader.
"'In that day,' declares the Lord Almighty, 'the peg driven into the firm place will give way; it will be sheared off and will fall, and the load hanging on it will be cut down.' The Lord has spoken." NIV translation
Even the people that God puts in positions of authority are only there for a season. Ultimately, all other world leaders will be removed at His coming. This reminds us that, if we put our faith in any man, they will let us down. We must remember that our faith is in Jesus Christ and anything else is a failure of faith.