(a) There is no theft, for it is supposed that the purpose of the user is to make only a temporary loan of the money.
(b) There is an act of injustice, if the permission of the owner cannot be presumed; for the rights of an owner are violated when one converts his property to uses displeasing to him. Thus, if the prospect is that the owner may never get his money back or that he will lose profits by the use made of it, the guilt of unjust damage is incurred, at least in intention (e.g., a depositary uses a deposit to buy stocks on margin, or a company official makes an unauthorized loan instead of investing the amount for the company’s benefit).
(c) There is no sin, if the permission of the owner can be reasonably presumed; for to him who willingly consents no injury is done. Thus, if one who is managing the funds of another has the chance to make a large amount of money today by using those funds for himself but cannot get in touch with the owner, the latter’s consent can be presumed, if he will suffer no present loss and it is absolutely certain that his funds will be returned tomorrow. But on account of the risk that is ordinarily present, this case would be rare.
1892. Comparison of Theft and Robbery.—(a) They differ in species, for theft contains injustice to an owner in his property, but robbery, which is an unjust and violent taking of what belongs to another, contains injustice both to property and to person. The unwillingness of the owner in the case of theft is due to his ignorance of his loss; in the case of robbery it is due to intimidation or force. (b) They differ in gravity, robbery being according to its nature the more serious kind of stealing; for the robber does a twofold injury, and the owner’s unwillingness to be robbed is greater.
1893. Kinds of Theft and Robbery.—(a) There are many varieties of theft, the differences arising from the circumstances in which the stealing is done. Thus, he who steals from the Church is guilty of sacrilegious theft; he who uses the public goods for his private ends commits peculation; he who takes from his parents practises domestic thievery.
(b) There are also many ways in which robbery or rapine is committed. The following persons are guilty of robbery: pirates, bandits, highwaymen, burglars, usurers, profiteers, venal judges, unmerciful creditors who deprive debtors of necessaries, debtors who escape payment by fraudulent bankruptcy, profiteers, laborers who extort unjust wages, those who force subordinates to contribute graft, and blackmailers. Two forms of robbery are described in Scripture as sins that cry to heaven for justice, namely, defrauding laborers of their wages (James, v. 4) and oppression of the poor, which happens especially when one denies their rights to those who are unable to defend them. The following persons are also classed as thieves: pickpockets, spongers, smugglers, forgers, counterfeiters, embezzlers, and those who misappropriate funds entrusted to them.
In the civil law theft is also known as larceny, and is defined as the unlawful severance of personal property from the possession of its owner. The following kinds of larceny are distinguished:
(a) in respect to the manner of perpetration, a theft is larceny when the property is taken from the possession of the owner by one who had no possession, whether the latter be a stranger or a custodian; it is embezzlement when committed by one upon whom the owner had conferred temporary possession on account of a fiduciary relationship between them; it is false pretence when committed by one who procures permanent possession or ownership through fraudulent representations;
(b) In respect to the matter or quantity stolen, theft is called petit larceny when it falls below a certain sum fixed by the law, grand larceny when it exceeds that sum.
1894. The Sinfulness of Theft.—(a) From its nature theft—and, much more, robbery—is a grave sin; for it is opposed to the virtues of charity and justice, it is expressly forbidden in the Seventh Commandment (“Thou shalt not steal,” Exod., xx. 15), and it excludes from eternal life (“Neither thieves nor extortioners shall possess the kingdom of God,” I Cor., vi. 10). The thief attacks the sacred right of the individual to his property, and imperils the peace and stability of society itself. Theft is a grave sin, even when it is committed by little and little, as happens when a merchant gives underweight habitually: “A deceitful balance is an abomination to the Lord” (Prov., xi. 1). The proposition that restitution for a large sum taken in parts at different times is not a grave duty was condemned by Innocent XI (Denzinger, 1188). Canonical penalties for theft include exclusion from acts and offices, censures, and deposition (Canon 2354).