When a person perceives the coming of divine help, and that it is this which aids them, then at once their heart is filled with faith, and they understand from this that prayer is the refuge of help, a source of salvation, a treasury of assurance, a haven that rescues from the tempest, a light to those in darkness, a staff of the infirm, a shelter in time of temptations, a medicine at the height of sickness, a shield of deliverance in war, an arrow sharpened against the face of their enemies, and, to speak simply: the entire multitude of these good things is found to have its entrance through prayer.