Hebrews 12:26-28

When God spoke from Mount Sinai his voice shook the earth, but now he makes another promise: “Once again I will shake not only the earth but the heavens also.” This means that all of creation will be shaken and removed, so that only unshakable things will remain. Since we are receiving a Kingdom that is unshakable, let us be thankful and please God by worshiping him with holy fear and awe.