His theological doctrines were attacked by Hilary of Poitiers,[5] whose Liber contra Auxentium remains the chief source of information about him.
[6] The historical period in which Auxentius lived was marked by the fight between the Arians and the supporters of the faith of the Council of Nicaea.
After Constantius' death, the pagan Emperor Julian (died 363) left Auxentius undisturbed in his diocese.
Under the following Christian Emperors, Jovian and Valentinian I, there were many attempts by the supporters of the Nicaean faith to depose Auxentius.
In 364 Auxentius was publicly accused in a disputation with Hilary of Poitiers held in Milan by order of the Emperor Valentinian I.