Often our problem is not that we don't believe, but that we listen to and believe the wrong things.
We listen to the world around us and believe if only we had certain things or if only certain things would happen, then we would be complete and fulfilled.
So we become frustrated and consumed with getting what we think we're lacking.
But God wants us listening to Him and believing that He is working all things around us for a good purpose and a glorious outcome.
And in the process He wants us to find our sufficiency in Him.
And the only way to be in that place is to continually have God's Word on your heart, and have your faith and vision shaped by what you hear Him saying.
So the scripture says... "faith comes by hearing, and hearing by the Word of God" (Rom.10:17)