Trouble is part of life in this sin-cursed world. Being a child of God does not exempt us from trouble and hard things. But "evil day" or day of trouble, is the place where Satan and his minions are sure to attack us in our minds with the goal of making us doubt God and question his faithfulness and his word. Put on the whole armor of God that you may be able to withstand this assault of the devil in your time of trouble.