(a) If the purpose of the speaker is to inflict serious injury on his neighbor, mortal sin is committed, since the gravity of the sin is measured by the malevolence of the will.

(b) If the purpose of the speaker is not to inflict serious injury, but only to indulge his love of talk, levity of mind, etc., the gravity of the sin depends on the actual harm that is done; for one wills indirectly the harm connected with one’s acts, even when one does not desire it directly (see 102). Hence, if the harm is in fact serious, mortal sin is incurred by the detractor, unless he is excused from it by the imperfection of his deliberation or consent. How much harm, then, is done in this case? Most moralists, it seems, think grave harm is done, since the loss of good name with one prudent man is generally more distasteful than its loss with many light-minded persons. Some moralists, however, dissent from this view, and hold that the harm done is small. They argue that the loss of good name with one prudent person (exception being made for the cases when he is the one person whose esteem is prized above that of all others, or when the crime revealed is an enormous or very degrading one) is not a great blow to reputation, since reputation consists in the opinion of many persons, and since a prudent man will be inclined to help rather than harm one who has been defamed in his presence. The advocates of the first opinion appeal also to the analogy of contumely and rash judgment, for these two sins are grave, even when the loss of honor or good opinion is in respect to one person only. But their adversaries deny the assumed parity: for, while contumely includes the purpose to injure and rash judgment includes the imputation to another of a defect of which he is not guilty or not known to be guilty, the detraction now considered is innocent both of design to injure and of calumny. Both opinions are probable, but the former seems to be more common and more likely.

2066. Belittling a Person to Himself.—It is not impossible to belittle a person to himself, for example, to make him believe that lie is illegitimate, that he is regarded with contempt by others, that his ability is mediocre or his character defective, etc. Is this defamation, or is it sinful?

(a) To lower a person in his own estimation is not defamation in the strict sense of the word, since defamation is properly an injury to the reputation that one has with one’s neighbors or with the public, not to the opinion one has of oneself. This sin belongs rather to derision (see 2106).

(b) To lower a person in his own eyes is sinful or not sinful according to the purpose intended or the means employed. Thus, if a parent, wishing to correct the pride or presumption of his son, gives the latter a true picture of his failings or limitations, the act is one of virtuous correction. But if an envious person, wishing to produce a sense of inferiority in another, deprives the latter of rightful peace of mind and of reasonable confidence in self, charity and justice are violated and there is a duty of restitution.

2067. Disclosing Matters Detrimental to Third Party.—In what cases is it lawful to disclose to others matters that will be detrimental to the reputation of a third party?

(a) If the communication is false, it is never lawful, no matter how important the reason; for the end does not justify the means. It is sinful, therefore, to resort to calumny as a defense of one’s own reputation or dignity (see 2035, 2036).

(b) If the communication is truthful and the matter is already well known to the persons addressed, there is no defamation, unless the communication makes these persons strongly convinced, whereas they had been rather uncertain before, or reveals to them some important detail about which they had been in ignorance.

(c) If the communication is truthful, but the defects are secret and unknown to the parties addressed, there is defamation, unless the person whose defects are revealed has lost his right to good name on account of the right of another person which has precedence and cannot otherwise be upheld (cfr. 2035). In this latter case there is no obligation to maintain silence, neither from justice (since the lesser right must yield to the greater right) nor from charity (since this virtue does not oblige at the cost of great inconvenience). Thus, Our Lord made known to the Apostles that the Pharisees were hypocrites (Luke, xii, 1; Matt., xvi. 6), and St. Paul told Timothy that Alexander and Hymeneus had neither faith nor a good conscience (I Tim., i. 20).

2068. Rights that Have Precedence over a False Reputation.—(a) The public good is to be preferred to a false reputation, for the public welfare is the ground for the right to such reputation, the subject himself being unworthy of the good name he bears (see 2037). It is right, therefore, to denounce criminals or conspirators to the proper authorities, or to testify against them. Employers have the duty to discuss together the failings or imperfections of their employees that interfere with the business; subjects should manifest abuses about which they are asked in a canonical visitation; students in a college should give information about companions who are depraving the morals of the student body or exercising an evil influence on the other residents, etc.