Your faith in God matters to God. In fact, God is most honored through your loving, active, death-defying, out-of-the-box faith. That being the case, He's committed to growing it. Big. Imagine how differently you would respond to difficulties, temptations, and even good things if you knew with certainty that God was in all of it and was planning to leverage it for good. But in order for all of that to happen, there's one thing it all hinges on - your trust.
* Influenced by "5 Faith Catalysts" from NPCC.