This world is the course of the contest and the arena of the courses. This time is the time of combat; and there is no law laid down in the field of combat and in the time of contest. That is to say, the King lays no limit on His warriors until the contest is finished and all men are brought to the gate of the King of kings, where each is examined whether he persevered in the contest and refused to admit defeat, or turned his back. For it oftentimes happens that a man who is altogether useless, who, because of his lack of training, is constantly pierced and thrown down, who is feeble at all times, suddenly seizes the banner from the hands of the mighty warriors, the sons of the giants, and makes his name famous....For this reason, no man should despair; only, let us not be negligent in prayer, nor be slothful to beseech the Lord for succor.
Homily 70 (p. 490).