Latinism . Give to each one what belongs to him, one of the pillars of Roman Law established by the jurist Ulpian, (Gnaeus Domitius Annius Ulpian), tutor and advisor to Emperor Alexander Severus. The full expression that appears in Justinian's Digest is this: Iuris praecepta sunt haec : Honeste vivere , alterum non laedere , suum cuique tribuere . ( D . 1 . 1 . 10 . 1 . ) . These are the precepts of law: live honestly, do no harm to anyone and give everyone their own.