In a collection of writings by J.B. Chapman available through Olive Tree, his book The Divine Response is included, where he describes in one sermon “The Quandary Of The Unassured,” those who don’t believe in God and have no assurance that God is a good God and answers prayers.
So he describes how we as believers are assured of those things:
The justice and mercy of God stand squarely against the idea that God would create a craving for himself in the hearts of His creatures and not provide a way for the satisfying of that craving or that He would inspire His creatures to look up and call upon Him when He had no intention of responding. To believe in a God as callous as that were worse than to have no faith at all. Our God is a good God. Even though it is not always possible to see the rainbow in the cloud, our confidence in Him is to the effect that somewhere the sun still shines, and that God still lives and answers prayer.
God not only puts the craving for a Pursuit of Him in our hearts, but He gives us the means to Pursue.
“To look up and call upon Him.”