(c) when they are repeated after having been involuntarily discontinued, if a notable period (say, three hours) intervenes between the two acts. Example: He who thinks thoughts of hatred until he falls asleep, or until he is distracted from them by something unusual going on about him, or by the entrance of a visitor, commits a second sin of hatred, when he returns to the same thoughts, if the interruption was so long that there is no moral connection between the two acts.

212. When acts tending to the same object are internal, but directed towards completion in some external act, they are multiplied numerically, in moral estimation, in the following cases:

(a) when they are repeated after having been renounced. Example: He who decides to steal, but repents for his sin, and then again decides to steal, commits two sins;

(b) when they are repeated after voluntary discontinuance, if the interval is not merely momentary. Example: He who thinks over a plan to acquire money unjustly, and then deliberately turns his thought away and gives all his attention to lawful affairs, but later resumes the dishonest planning, commits a new sin;

(c) when they are repeated after involuntary discontinuance, if the interval is notable in view of the external act desired, and nothing external was done that could serve as a link to unify the two acts. Example: A burglar plans a robbery that could easily be carried out at once, but he takes no steps to execute his plan, and soon forgets about it. A month later, passing the house he had intended to rob, he remembers his plan and carries it out. Two distinct sins were here committed.

213. Involuntary discontinuance does not, however, separate the acts into two distinct sins: (a) if the interval was brief in view of the external act that was desired (e.g., if the burglar above mentioned had forgotten his plan for a few days only before he renewed it and carried it out); (b) if something had already been done by reason of the first act (e.g., if the burglar, after resolving to rob the house, had procured keys or tools for the purpose, and had kept them with this in mind, although he allowed months and years to pass without making any attempt to fulfill his design).

214. When the acts tending to the same object are external, they are multiplied numerically in moral estimation, and make distinct sins as follows: (a) if the internal acts from which they proceed are numerically distinct sins (e.g., if a burglar attempts to rob a house, but leaves his work unfinished because he becomes conscience-stricken or is interrupted, and later makes another plan and another attempt, there are two sins); (b) if the external acts are of such a kind that no internal intention can make them morally one act, even when one follows directly upon the other (e.g., missing Mass on Sunday and again on the following day, a holyday, makes one guilty of two distinct violations of the law).

215. In the following cases, however, distinct external acts with reference to the same object do not multiply the number of sins: (a) when these acts form a part of one moral whole, and are intended as such by the agent (e.g., one who reads a forbidden book, but divides it into parts, reading only so many pages a day); (b) when these acts have to one another the relation of means to a common end, and they are intended as such by the agent (e.g., various preparations made for robbery).

216. Third Rule of Numerical Distinction.—One sinful act, internal or external, that is concerned with objects that are physically many, but morally one, makes but one sin in number. Example: He who steals a purse that contains ten bills commits one sin; he who calumniates a family of ten persons commits one sin; he who steals what is the common property of three proprietors commits one sin.

217. When the objects are not morally one of themselves, they may become so through the belief of the one who acts, since distinct malices are not incurred except as apprehended (see 588-592). Example: He who tells three different lies against a neighbor (e.g., that he is a thief, a drunkard and a liar), commits one sin of calumny, if he has in mind general injury to reputation, but does not think at the time of the special injuries contained in his calumny. Likewise, he who calumniates before ten persons commits but one sin of calumny, if, being in a passion, he thinks only of the harm he wishes to cause and not of the number of persons who are present.