Here's the thing:
When you're faced with hard times, do you
1. Look and see all the things you don't have in your life especially the ones you've prayed for? or
2. Look at all God has done for you in the past and trust his promises?
The thing here is the enemy works to control your gaze. All he needs to do is get us to see certain things and the rest will follow: fear, panic, sin, blasphemy, doubting God, etc
If he gets you with option 1, then his work is easy.
If you get to option 2, then you know He who parted the Red Sea can provide for you and you can say Psalm 46 and rest easy.
So, it is important to take control of your gaze before the enemy takes it over and if he does, refocus it. You're in control of you.