If we doubt Gods faithfulness, we need only look out our window each morning; the sun continues to rise, the seasons change, the earth heals itself after the storm. As His most personal creation, we can depend on His loving care from day to day, unending, unwavering, undeniable. We have past proof, present peace, future hope.
When life looks difficult and nights are the darkest, when everyone has disappointed and all our possessions have failed us then we will know His mercy and grace in whole new way. When we can do no other than depend on Him He will always come through.