The Bible often employs the imagery of shaking or trembling to depict the intense terror and panic that overtakes those who suddenly realize their lives may be at risk. This imagery frequently illustrates the heightened emotional reaction of a nation upon hearing news of an approaching army, particularly God's army. Moses trembled and averted his eyes when he understood at the burning bush that he was in the presence of the God of the patriarchs. Isaiah, upon seeing the Lord on His throne and hearing the doorpost-jarring voice of a seraph, feared for his life, believing he was as good as dead for having witnessed His glory. Ezekiel, similarly, was driven flat on his face in fear, so drained of strength that he needed assistance to stand. The most terrifying shaking to demonstrate God's power before mankind is yet to come, universal in scope, accompanying Jesus Christ's return. This event, focused on Jerusalem, underscores a profound spiritual importance for Christians. We are urged not to refuse Him who speaks from heaven, whose voice will shake not only the earth but also heaven, removing those things that can be shaken so that what cannot be shaken may remain. Therefore, since we are receiving a kingdom which cannot be shaken, let us have grace to serve God acceptably with reverence and godly fear, for our God is a consuming fire. God calls on His children to avoid the self-absorbed lethargy of this world, reminding us that judgment is now on His house. Those who do not pass His muster will be denied protection from the horrifying earthquake at Christ's return, a terror so great that people will plead for death. Our attention must be riveted on pleasing Him, focusing on the spiritual things that cannot be shaken.

Fear and trembling refers to fear of disappointing God and fear of disobeying God. People should tremble at the thought of disobeying God because trembling beforehand helps prevent disobedience. Fear and trembling remain partly due to temperament yet the power that works within enables believers to work out their own salvation. This spiritual power allows the work to proceed in godly fear and reverent trembling. Believers do not become persons who are unafraid and no longer subject to fear. They continue to work out salvation with the power that produces both the will and the doing for His good pleasure.