"This phrase, “Yet once more,” indicates the removal of things that are shaken—that is, things that have been made—in order that the things that cannot be shaken may remain."
No matter what happens, God will never change. Those who are in Christ are unshakeable because they are being held in the hand of the Eternal One. You who are in Christ are a child of God and nothing in this world can ever change that because it is God who has ordained you for salvation and has adopted you legally to be his child. At the end of the day and everything is falling apart, rejoice! Rejoice because you have a Father in heaven who will never leave you or forsake you.
A time is coming soon when heaven and earth will pass away, but the Word of Christ endures forever. (Mt 24:35, Mk 13:31, Lk 21:33) God's promises to us stand firm forever. They cannot be shaken by anything. They are the firm foundation on which we build (Mt 7:24). They never fade and they never falter and in the end they will be all that remain.
Why wait until heaven to enjoy your salvation when salvation has come unto the world? Everything God creates is made to change. So even when you are robbed of all that you hold dear and life takes its toll you can still say, "God is my gracious Father because Christ is my faithful husband! Why should I worry?"