“Go forward,” frequently tries their faith to the uttermost. But if they should defer obedience till every shadow of uncertainty was removed from their understanding, and there remained no risk of failure or defeat, they would never move on at all. Those who think it impossible for them to yield to the will of God and have faith in his promises until all is made clear and plain before them, will never yield at all. Faith is not certainty of knowledge, it is the substance of things hoped for, the evidence