“Nonbelievers and those struggling with doubt have been heard to ask, ‘If God exists, why doesn’t God make that fact obvious?’ This statement from Jesus [‘Daughter, your faith has saved you.’ Mark 5:34] may hint at part of the answer. Perhaps there is something profoundly important in faith itself, separate from God’s other gifts. Perhaps in the sometimes frustrating, painful unknowing when we act out of faith, not sure at all that we actually believe, some change is wrought in us, some hardness softened that can’t be softened any other way.”
Aileen O’Donoghue in Living Faith, one of my favorite sources for daily Catholic devotions.