9.7.15   Not long had the Church of Milan begun to use this kind of consolation and exhortation, the brethren zealously joining with harmony of voice and hearts. For it was a year, or not much more, that Justina, mother to the Emperor Valentinian, a child, persecuted Thy servant Ambrose, in favour of her heresy, to which she was seduced by the Arians. The devout people kept watch in the Church, ready to die with their Bishop Thy servant. There my mother Thy handmaid, bearing a chief part of those anxieties and watchings, lived for prayer. We, yet unwarmed by the heat of Thy Spirit, still were stirred up by the sight of the amazed and disquieted city. Then it was first instituted that after the manner of the Eastern Churches, Hymns and Psalms should be sung, lest the people should wax faint through the tediousness of sorrow: and from that day to this the custom is retained, divers (yea, almost all) Thy congregations, throughout other parts of the world following herein.