[PAULUS libro quinto decimo ad Plautium. ] §7.4.20.prIs qui usum fructum habet si tantum utatur, quia existimet se usum tantum habere, an usum fructum retineat? et si quidem sciens se usum fructum habere tantum uti uelit, nihilo minus et frui uidetur: si uero ignoret, puto eum amittere fructum: non enim ex eo quod habet utitur, sed ex eo quod putauit se habere.
[PAULUS in the fifteenth book on Plautius.] If a person who has a usufruct uses it only, because he thinks that he has only a use, does he retain the usufruct? And indeed, if knowing that he has a usufruct, he wishes only to use it, he is nonetheless deemed also to enjoy it; but if he is ignorant of this, I think that he loses the enjoyment: for he does not use by virtue of what he has, but by virtue of what he thought he had.