Whether the other six precepts of the decalogue are fittingly expressed?

Objections

Objection 1 : It seems that the other six precepts of the decalogue are unfittingly expressed. For it is not sufficient for salvation that one refrain from injuring one's neighbor; but it is required that one pay one's debts, according to Rm. 13:7, "Render . . . to all men their dues." Now the last six precepts merely forbid one to injure one's neighbor. Therefore these precepts are unfittingly expressed.
Objection 2 : Further, these precepts forbid murder, adultery, stealing and bearing false witness. But many other injuries can be inflicted on one's neighbor, as appears from those which have been specified above (Questions [72], seq.). Therefore it seems that the aforesaid precepts are unfittingly expressed.
Objection 3 : Further, concupiscence may be taken in two ways. First as denoting an act of the will, as in Wis. 6:21, "The desire [concupiscentia] of wisdom bringeth to the everlasting kingdom": secondly, as denoting an act of the sensuality, as in James 4:1, "From whence are wars and contentions among you? Are they not . . . from your concupiscences which war in your members?" Now the concupiscence of the sensuality is not forbidden by a precept of the decalogue, otherwise first movements would be mortal sins, as they would be against a precept of the decalogue. Nor is the concupiscence of the will forbidden, since it is included in every sin. Therefore it is unfitting for the precepts of the decalogue to include some that forbid concupiscence.
Objection 4 : Further, murder is a more grievous sin than adultery or theft. But there is no precept forbidding the desire of murder. Therefore neither was it fitting to have precepts forbidding the desire of theft and of adultery.