Section — McHugh–Callan, Moral Theology
The Vows
The Obligation of the Three Principal Vows
The Obligation of the Three Principal Vows.—(a) Poverty is a renunciation of the independent use of external corporal goods, such as money and lands and chattels (simple vow), or also of the radical dominion (see 1697) or right of ownership of such goods (solemn vow). Grave matter in the unjust violation of poverty seems to be the same as in other acts of unjust damage or acquisition, and hence in thefts from outsiders a less amount is grave matter, in domestic thefts from the monastery a greater sum is required (see 1900, 1903). Grave matter in the violation of poverty that is not unjust (e.g., in use of money without permission) seems to be the same as absolutely grave matter for thefts, unless the constitutions rule otherwise; but grave matter here does not coalesce from many small violations. The virtue, but not the vow, of poverty is offended by purely internal acts (e.g., attachment to wealth), and there is no offense at all in dominion over spirituals (such as fame, good reputation) which are not renounced by the vow of poverty, and in certain acts of disposition (e.,g., acceptance of deposit, distribution of alms) or proprietorship (e.g., of manuscripts) permitted by rule.
(b) Chastity is a renunciation of all venereal pleasure, internal and external, lawful and unlawful. Grave matter is the same as for the virtue of chastity, but the vow could be violated without the violation of the virtue (e.g., in the use of marriage by one simply professed). For the protection of this vow the Church has made the law of cloister, which forbids under certain conditions the entrance of outsiders into a religious house or the egress of the religious (Canons 547, 598, 600-604, 679, 2342).
(c) Obedience is the renunciation of one’s own will with the duty of submission to commands of a Superior given according to the rules and constitutions. There is grave matter against the vow if one disobeys in an important matter imposed by the Superior in the name of obedience and according to the rite prescribed by the rule or constitutions (see 2364). The virtue, but not the vow, is offended by internal insubordination (see 2357); neither virtue nor vow is offended when a Superior commands what is above the rule (e.g., the accomplishment of the impossible, heroic acts that do not pertain to the nature of the institute), or against the rule, unless he has power to dispense, or probably what is beneath the rule (such as things manifestly ridiculous and useless). Since obedience is vowed to the precepts of the Superior, the vow is not broken by transgression of points of the rule not expressly included under the vow, nor by transgressions of the general precepts of God and the Church.