I answer that, Two things are competent to man in respect of exterior things. One is the power to procure and dispense them, and in this regard it is lawful for man to possess property. Moreover this is necessary to human life for three reasons. First because every man is more careful to procure what is for himself alone than that which is common to many or to all: since each one would shirk the labor and leave to another that which concerns the community, as happens where there is a great number of servants. Secondly, because human affairs are conducted in more orderly fashion if each man is charged with taking care of some particular thing himself, whereas there would be confusion if everyone had to look after any one thing indeterminately. Thirdly, because a more peaceful state is ensured to man if each one is contented with his own. Hence it is to be observed that quarrels arise more frequently where there is no division of the things possessed.
The second thing that is competent to man with regard to external things is their use. In this respect man ought to possess external things, not as his own, but as common, so that, to wit, he is ready to communicate them to others in their need. Hence the Apostle says (1 Tim. 6:17, 18): "Charge the rich of this world . . . to give easily, to communicate to others," etc.
Reply Obj. 1: Community of goods is ascribed to the natural law, not that the natural law dictates that all things should be possessed in common and that nothing should be possessed as one's own: but because the division of possessions is not according to the natural law, but rather arose from human agreement which belongs to positive law, as stated above (Q. 57, AA. 2, 3). Hence the ownership of possessions is not contrary to the natural law, but an addition thereto devised by human reason.
Reply Obj. 2: A man would not act unlawfully if by going beforehand to the play he prepared the way for others: but he acts unlawfully if by so doing he hinders others from going. In like manner a rich man does not act unlawfully if he anticipates someone in taking possession of something which at first was common property, and gives others a share: but he sins if he excludes others indiscriminately from using it. Hence Basil says (Hom. in Luc. xii, 18): "Why are you rich while another is poor, unless it be that you may have the merit of a good stewardship, and he the reward of patience?"
Reply Obj. 3: When Ambrose says: "Let no man call his own that which is common," he is speaking of ownership as regards use, wherefore he adds: "He who spends too much is a robber." _______________________
THIRD ARTICLE [II-II, Q. 66, Art. 3]
Whether the Essence of Theft Consists in Taking Another's Thing
Secretly?
Objection 1: It would seem that it is not essential to theft to take another's thing secretly. For that which diminishes a sin, does not, apparently, belong to the essence of a sin. Now to sin secretly tends to diminish a sin, just as, on the contrary, it is written as indicating an aggravating circumstance of the sin of some (Isa. 3:9): "They have proclaimed abroad their sin as Sodom, and they have not hid it." Therefore it is not essential to theft that it should consist in taking another's thing secretly.
Obj. 2: Further, Ambrose says [*Serm. lxiv, de temp., A. 2, Obj. 3, Can. Sicut hi.]: and his words are embodied in the Decretals [*Dist. xlvii]: "It is no less a crime to take from him that has, than to refuse to succor the needy when you can and are well off." Therefore just as theft consists in taking another's thing, so does it consist in keeping it back.
Obj. 3: Further, a man may take by stealth from another, even that which is his own, for instance a thing that he has deposited with another, or that has been taken away from him unjustly. Therefore it is not essential to theft that it should consist in taking another's thing secretly.