This passage of Revelation brings to my mind the kid's game called king of the hill. Do you know this game? It is an outside game and involves one of the kids being on top of a hill and the other kids trying to push / pull him off. When someone is able to push / pull the "king" off his hill (off his throne) another person would immediately run up on the hill and take his place. This new person would now be the king and the others would have to challenge him for the right to be the king of the hill and sit on the throne.
This passage of Revelation describes the ultimate, eternal king of the hill. However, unlike the kid's game, God has a throne that can never fail. His throne will never be abdicated or taken by force. God created his throne, the place in which it is located, and its attendants and guardians to bring Him praise and worship forever.
This passage of Revelation opens the throne room of heaven to us. John describes to us the worship of God Almighty by those in the throne room. We hear and heed the call to acknowledge His power, dominion, and right to unleash the judgments later described in Revelation. It is very reassuring to me to know we have a heavenly father of this nature.
Our lives are full of change. As we go through this life we change physically and mentally - many of us make dramatic changes in our adult life. The world around us moves very quickly and it is easy to get caught in the hustle and bustle. Sometimes it seems everything in our lives is always dynamic. It helps me, and I hope it helps you, to take a step back when I feel overwhelmed and remember this passage of Revelation. To remember that God is constant, will never fail, and will obtain ultimate victory.
Wishing you much success in your walk with Christ,