"There is no reason to stagger at, or hesitate about any of the promises of God, since they are made by Him that cannot lie. His faithfulness is engaged to perform them; with Him all things are possible." (John Gill's Commentary) Is God seemingly delaying the manifestation of His favor to you - leaving you with nothing more than a promise from His Word? Like David, the Holy Spirit is saying for you to resolve to glory or boast in the promise of God with undiminished confidence. And then stand back and watch Him come through for you!