I. According to the teaching of St. Thomas there are three ways of doing penance, namely, fasting, prayer, and alms-deeds—either corporal or spiritual. Therefore you must not suppose you are prevented from doing penance when not allowed to subject your body to severe fasts and painful mortifications. The other two penitential works, prayer and alms-giving, can in this case take the place of corporal austerities in the fulfilment of the Christian duty of penance. Observe also that it is not in accordance with the spirit of the laws of God and of his Church, which prescribe fasting, to injure your health thereby, nor to hinder the accomplishment of the duties of your state of life. 2. Labor, sickness, disappointments, reverse of fortune, dryness in prayer, all these when accepted with resignation are penitential works, such, too, as are the more agreeable to God from their being so distasteful to ourselves. All virtues may be divided into two great classes, active and passive. The characteristic of the active virtues is to do good, of the passive, to endure evil. Now the virtues of the second class are more meritorious and less perilous. In the active virtues nature can have a large share, and a dangerous self-complacency, or satisfaction in their effects, may easily glide into them. This danger is less to be feared in the practice of the passive virtues, especially when the sufferings are not of our own choosing but come to us direct from the hand of God. 3. St. Jerome teaches that when the devil cannot turn a soul away from the love of virtue, he tries to urge it to excessive mortification, in order that it may thus become exhausted and lose the vigor indispensable to its spiritual progress. Numbers of devout people have fallen into this snare. 4. “I charge you,” says St. Francis de Sales, “to preserve your health carefully, for God exacts this of you, and to husband your strength so as to employ it in his service. It is even better to save more than the requisite amount of strength than to reduce it too much, for we can always lessen it at will, whereas, once lost, it is no easy matter to regain it.” Therefore give your body the nourishment it needs to maintain its strength and health. 5. We learn from Cassian and St. Thomas that in a celebrated conference held by the holy Abbot St. Anthony with the most learned religious of Egypt, it was decided that of all virtues moderation is the most useful, as it guards and preserves all the others. It is owing to the lack of this essential moderation in their devotional exercises and mortifications that many persons whilst seeking holiness find only ill health. As a consequence they eventually abandon the path of perfection, judging it impracticable because they have attempted to walk in it bound with fetters.