Shaken but not stirred
See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape, if we turn away from him that speaketh from heaven: Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven. And this word, Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain.
Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear: For our God is a consuming fire.
The powers that be are being shaken and have been since Christ was crucified. You may recall that as a consequence of Jesus’ death, many [Old Testament] saints where made alive and rose from the dead (Matthew 27:50-53). Those saints no doubt heard the “voice” that speaks and rose from their graves (see John Chp. 11). The sacrificial death of the Lamb of God not only made it possible from those who believe in Jesus Christ to be saved from sin, but the resurrection of that Lamb now enthroned above every name that is named, far above every principality and power, exerts His authority over His enemies - “… this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; from henceforth expecting till his enemies be made his footstool.” Hebrews 10:12-13.
Jesus has all authority in heaven and in earth (Matthew 28:18), and He is exercising that authority right now, and will until “he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power.” I Corinthians 15:24.
The question is - are we hearing Him that speaks from heaven? Are we seeing the removal of those things that can be shaken? But more importantly, are we in that kingdom which cannot be moved?