In Hebrews 12:27 the final shaking of the Tribulation before the Second Coming will introduce a final unshakeable order. This is the Messianic Kingdom. The apostle is still quoting from the book of Haggai, yet once more, to illustrate how this applies. According to Haggai 2:6, in that final shaking, the old will pass away and the new will be brought in. This action will give the saints a wonderful place to live for all eternity. The application to the 1st century Jewish audience is that to go back to the Levitical system is to go back to something that is about to be destroyed.