[GAIUS libro primo de testamentis ad edictum praetoris. ] §35.1.16.prIn his, quae extra testamentum incurrerent, possunt res ex bono et aequo interpretationem capere: ea uero, quae ex ipso testamento orerentur, necesse est secundum scripti iuris rationem expediri.
[GAIUS in the first book on testaments, to the praetorian edict.] In those matters which occur outside a testament, things can receive an interpretation based on what is good and fair; however, those which arise from the testament itself must of necessity be resolved according to the principle of written law.