“Sanctify the Lord of hosts himself; and let him be your fear, and let him be your dread” (Isa. 8:13). The fear of God will swallow up the fear of man. A reverential awe and dread of God will extinguish the creature’s slavish fear, as the rain puts out the fire. To sanctify the Lord of hosts is to acknowledge the glory of His sovereign power, wisdom, and faithfulness. It includes not only a verbal confession, but internal acts of trust, confidence, and entire dependence upon Him. These are our choicest respects towards God, and give Him the greatest glory. Moreover, they are the most beneficial and comfortable acts we perform for our own peace and safety in times of danger. If we look to God in the day of trouble, fear Him as the Lord of hosts (i.e., the One who governs all creatures and commands all the armies of heaven and earth), and rely upon His care and love as a child depends upon his father’s protection, then we will know rest and peace. Who would be afraid to pass through the midst of armed troops and regiments, if he knew that the general was his own father? The more this filial fear has power over our hearts, the less we will dread the creature’s power. When the dictator ruled at Rom, then all other officers ceased. Likewise, when the fear of God is dictator in the heart, all other fears will (in great measure) cease.
John Flavel, Triumphing Over Sinful Fear (5-6)