A trembling life destroys the spiritual comforts that flow from God’s promises. It also destroys our experience of the promises—the sweetest pleasures we have in this world. As no creature-comfort is pleasant, so no promise is sweet to the person living in bondage to fear. When the terrors of death are great, the comforts of the Almighty are small. In the written Word, there are all sorts of refreshing, strengthening, and heart-reviving promises. By His care and wisdom, God prepared these for our relief in days of darkness and trouble. There are promises of support under the heaviest burdens and pressures: “Fear thou not; for I am with thee; be not dismayed; for I am thy God: I will strengthen thee; yeah, I will help thee; yea, I will uphold thee with the right hand of my righteousness” (Isa. 41:10). This promise is made to make the trembling soul shout with the joy of men in harvest, or men who divide the spoil. There are also promises of protection (Isa. 27:2–3; 33:2). In times of danger, these lead to God’s almighty power, placing us under the wings of His care. There are promises of moderation. They enable us to bear the day of sharp affliction ( Isa. 27:8; 1 Cor. 10:3). There are promises of deliverance. If our enemies’ malice brings us into trouble, God’s mercy will assuredly bring us out (Pss. 91:14–15; 125:3). There are promises to bless and sanctify our troubles for our good; our troubles not only cease to be hurtful, but they become exceedingly beneficial (Isa. 27:9; Rom. 8:28). These are the most comforting promises of all.
Our tender Father provides all these promises for the day of fear and trouble. Because He knows our weakness and how our fear makes us doubt our security, He engages His wisdom, power, care, faithfulness, and unchangeableness for the performance of His promises (Isa. 27:2–3; 43:1–2; 1 Cor. 10:13; 16:9; 2 Peter 2:9). In the midst of such sealed promises, how cheerful should we be in the worst of times! We should say as David, “Wherefore should I fear in the day in of evil?” (Ps. 49:5a). Let those who have no God to whom they can turn, no promise upon which they can rely, fear int eh day of evil. I have no cause to do so. Yet our fear beats us away from the most comfortable refuge in the promises. We are so scared that we ignore them and fail to draw encouragement, resolution, and courage from them. In this way, the shields of the mighty are cast away.
John Flavel, Triumphing over Sinful Fear, 59-60