W. Austin Gardner
The Mind of Faith

Faith is illustrated in Romans 4:17-21. Faith is the opposite of doubt. Faith is hoping against hope. It is believing God when there is no reason to believe except the character of God Romans 4:18. Faith is not considering the circumstances where we find ourselves but instead the promise of God. Romans 4:19.
Faith is not staggering at the promise of God even though it is more than one would ever have been able to expect unless God was doing something great. Romans 4:20. Faith is being fully persuaded that God can do what he promised. Romans 4:21
Doubting God is illustrated in the story of Mark 4:35-40. The Lord Jesus tells His disciples to get in the boat and go to the other side. A great storm arises when they are in the middle of the sea. They are afraid. Jesus was unafraid and asleep in the rocking boat. When He awakes, Jesus questions them on why they are so scared. He doesn't seem to understand why they had no faith.
Their questions kind of followed this pattern. If Jesus loved them, would He put them in the middle of this type of storm? If He loved them, wouldn't He take care of them? Did Jesus not know what was going to happen? Did He not have the power to take care of them no matter what happened? Why did He seem not to be the least bit worried about them?
The truth is that Jesus was teaching them to trust Him. He knew what was happening. He was at work in their lives at that very moment.
You need to get rid of your doubtful minds and begin believing God. You need to confess it as sin Romans 14:23, Hebrews 11:6. You need to put your focus on Him Isaiah 26:3, Philippians 4:8. You need to believe all you can and ask for help when your faith is weak. Mark 9:23-24. You must accept the promise even though you have every human reason to doubt it. Hebrews 4:2
You need to stop making excuses. You are not doubting yourselves but your God, His Word, and His promises.