See that you do not refuse him who is speaking. For if they did not escape when they refused him who warned them on earth, much less shall we escape if we reject him who warns from heaven. His voice then shook the earth; but now he has promised, "Yet once more I will shake not only the earth but also the heaven." This phrase, "Yet once more," indicates the removal of what is shaken, as of what has been made, in order that what cannot be shaken may remain. Therefore let us be grateful for receiving a kingdom that cannot be shaken, and thus let us offer to God acceptable worship, with reverence and awe; for our God is a consuming fire. Hebrews 12:25–29
How long does it take for your world to come crashing down? We know that our lives can be changed in the blink of an eye in ways we would never imagine only seconds before. We work very hard to ensure that our lives are as stable as we can make them. We expend significant amounts of energy to hold the forces of chaos at bay.
We may succeed for a time, but throw a new virus into the world and watch so many well-planned lives become little more than dust driven by the wind. As much as we would prefer not to admit it, our lives, our world, can be shaken with no more than a small blip on the cosmic scale.
We are not permanent. Each hour of every day draws us closer to the time when all our plans will be as nothing. Like the Rich Fool of the parable who amassed such wealth that new barns were needed to store it all. As he planned his future, that night, his life ended.
Perhaps it would be more accurate to state that we are no more permanent than the earth. Yes, it may last a few eons past the time we are no longer even dust, but it will one day be gone as well. As the Psalmist writes: He utters His voice, the earth melts. (Psalm 46.6b)
Some say that's all there is; our Father in heaven promises more to come. More and better to come, a new heaven and new earth to come. These will be unshakeable and eternal, and they shall be our home with the Father for beyond the ages.