sui juris

As regards persons in private custody, e.g. persons not sui juris detained by those not entitled to their guardianship or lunatics, or persons kidnapped, habeas corpus ad subjiciendum seems not to have been the ordinary common law remedy.

No Roman patrician was ever imbued with a greater sense of the sui juris of the sacred rights with which "the city" had invested her.

In the years before the war, when the influx of patients from all parts made me independent of the favor or disfavor of my native city, I followed the rule of not treating anyone who was not sui juris, was not independent of all other persons in his essential relations of life.

Subsistence is not an accident, even though it supervenes on the complete nature, for it determines the substance of the latter, not in relation to any line of accidental activity, as a power or faculty, nor as something modifying it accidentally, but as a mode which ultimately determines and perfects it in the order of substantial reality itself, in the order of “existing in itself” in such a full and perfect manner as to be sui juris and incommunicable.

Subsistence connotes, over and above the mode of “existing in itself” which characterizes all substance, the notion that the substance or nature is individual, that it is complete, that it is in every way incommunicable, that it is sui juris or autonomous in its existence and activities.