Hebrews 4:16

Therefore let us approach the throne of grace with confidence and without fear, so that we may receive mercy (for our failures) and find grace and help in time of need.

Suppose we don’t believe God will do what He says regarding finances, healing, guidance, and wisdom. We will not approach God in faith and confidence. We will not receive from God if we don’t believe He will answer our prayer. When we have confidence and no fear, we believe and know we have the answer.