The Ecclesiastical History of Theodoret 88Of the reign of Valentinianus, and how he associated Valens his brother with him.

When the troops had become acquainted with the emperor's sudden death, they wept for the departed prince as for a father, and made Valentinian emperor in his room. It was he who smote the officer of the temple and was sent to the castle. He was distinguished not only for his courage, but also for prudence, temperance, justice, and great stature. He was of so kingly and magnanimous a character that, on an attempt being made by the army to appoint a colleague to share his throne, he uttered the well-known words which are universally repeated, "Before I was emperor, soldiers, it was yours to give me the reins of empire: now that I have taken them, it is mine, not yours, to take counsel for the state." The troops were struck with admiration at what he said, and contentedly followed the guidance of his authority. Valentinian, however, sent for his brother from Pannonia, and shared the empire with him. Would that he had never done so! To Valens, who had not yet accepted unsound doctrines, was committed the charge of Asia and of Egypt, while Valentinian allotted Europe to himself. He journeyed to the Western provinces, and beginning with a proclamation of true religion, instructed them in all righteousness. When the Arian Auxentius, bishop of Milan, who was condemned in several councils, departed this life, the emperor summoned the bishops and addressed them as follows: "Nurtured as you have been in holy writ, you know full well what should be the character of one dignified by the episcopate, and how he should rule his subjects aright, not only with his lip, but with his life; exhibit himself as an example of every kind of virtue, and make his conversation a witness of his teaching. Seat now upon your archiepiscopal throne a man of such character that we who rule the realm may honestly bow our heads before him and welcome his reproofs,--for, in that we are men, it needs must be that we sometimes stumble,--as a physician's healing treatment."