(b) in certain cases when occult compensation is the only way in which one can defend or secure one’s right to property, for it is not wrong to take what is one’s due, if this is done without harm to the rights of others.
1921. Conditions for Lawful Occupation of the Goods of Others in Extreme Need.—(a) The occupation must be necessary for securing one’s own or another’s natural right to some supreme good, such as life or what is almost the equivalent of life (e.g., freedom from cruel restraint, escape from fearful disease). A supreme good is at stake, then, when one is in extreme, quasi-extreme, or most grave need (see 1236), that is, exposed to the certain or very probable peril of losing life, limbs, liberty, sight, chastity, etc.; occupation is necessary when there is no other way (e.g., by begging) to avert the danger.
(b) The occupation must be made without detriment to the rights of others. Hence, one may not occupy more than is really necessary to escape the danger; one may not occupy at all if the owner is situated in an equal danger (e.g., one may not take the plank from a man in danger of drowning in order to save oneself); one may not retain the thing taken, if the danger has passed (e.g., one who commandeered his neighbor’s car in order to escape from a thug must return the car). The neglect to ask permission, however, does not exceed a venial sin and does not impose the duty of restitution, if there is a real reason for occupation. One may not take the goods without permission, if this can be obtained without too much difficulty; nor forcibly, if possession can be had peaceably.
1922. Restitution for Occupied Goods.—Is the occupier bound to restitution for occupied goods that were consumed (e.g., food and drink), if he afterwards becomes able to pay for them?
(a) If the occupier had no prospect at the time of ever being able to pay for what he took, he is not bound to restitution—not because of possession, since the thing has perished, nor because of the taking, since there was no onerous contract, nor because of injury, since he acted within his rights. The owner cannot complain at this, since charity obliges him to give of his own free will to one who is in supreme need and not to expect that the alms be paid back, while justice forbids that he impede the appropriation of what is needed by the person in distress. It seems, however, that a case of this character would rarely happen, and, if it did happen, the more decent thing would be to pay for what was used. Some moralists think that more probably there would be an obligation of justice to do this, since occupation is lawful only in so far as it is necessary.
(b) If the occupier had the prospect at the time of being able to pay for what he took, he is bound to restitution; for one should not occupy more than is necessary, and, if a loan suffices to tide one over a difficulty, it is not right to expect a gift. Hence, men who raid bakery shops in times of food shortage, are bound to make restitution to the bakers when able.
1923. Occupation in the Case of Merely Grave Necessity.—Is it lawful to occupy in merely grave or ordinary necessity?
(a) This is not lawful, for otherwise the doors would be opened to thefts without number, and both the security of property and the peace of the public would be at an end. Innocent XI condemned the proposition that it is permissible to steal in great need (Denzinger, n. 1186). (b) Such occupation is less sinful than to occupy without necessity, and indeed the theft may be only venial if one is in grave need and has vainly sought work or charity to relieve the difficulty, as when a poor man who is not able to give his children all the food they need steals provisions now and then.
1924. Occupation of a Large Sum by One in Dire Need.—(a) One opinion holds that even for the sake of avoiding death this is not permissible, for one has no right to extraordinary means for the protection of one’s life.
(b) A second opinion maintains that this occupation is lawful, under the conditions given in 1921; for life is more precious than even a large sum of money, and in such extreme need property right yields to the right to life.