arouses the attention of the reader, prepares the mind for understanding [and]  strengthens the memory by art. The classification is this, that every man is either  in his own potestas or another's, or his situation is doubtful, as some say, who  claim that the status of a person may be in suspense, as [the sons]22 of one captured  by the enemy. But, in truth, it would be absurd if anyone at a particular time  were neither in his father's potestas nor in his own. For the statement that his status  is in suspense is only true by reason of the future effect of the fiction of postliminium,  which is wholly distinct from jus,23 for if he [the father] returns it will be as though  he had never been captured, but when his present status is examined it is not  in suspense at all, for the law says one captured by the enemy is a slave. Thus it is  impossible for him to have his son in his potestas. And it is generally true that  nothing in the present or past is in suspense.24
Those who are
[not] sui juris.  25All those are sui juris who are not within the potestas of another. Thus once  persons who are alieni juris are recognized, all others may, in consequence, be  known to be sui juris. Under the potestas of others are bondsmen, the authority of  their lords being sanctioned by the jus gentium; it once extended to life and death  but is now restricted by the civil law--life and member are in the king's potestas,26  so that if one kills his bondsman he is punished no less severely than if he had  killed another's. And in this respect bondsmen have a right of action against their  lords, they may proceed against them in court in matters [where the punishment is  that] of life and members,27 because of their lords' violence, or because the wrong  is an insufferable one,28 as where their lords so strip them that their wainage cannot  be saved them.29 For it is to the interest of the res publica that no one misuse his  own.30 The effect of this seignorial power is that whatever is rightfully acquired  by the bondsman is acquired by his lord,31 or his quasi-lord, [that is], a bona fide  possessor, a usuary or a fructuary.32
Those who are in the potestas of fathers.
 33Under the authority of fathers are sons begotten in rightful and lawful wedlock.  Under that of grandfathers and great-grandfathers on the paternal side are  grandsons and great-grandsons. He is presumed to be one's son by the very fact  that he is born of one's