On his return to Constantinople Theodosius kept within the bounds of piety which he had learnt from the great archbishop. For when the occasion of a feast brought him once again into the divine temple, after bringing his gifts to the holy table he straightway went out. The bishop at that time was Nectarius, and on his asking the emperor what could possibly be the reason of his not remaining within, Theodosius answered with a sigh “I have learnt after great difficulty the differences between an emperor and a priest. It is not easy to find a man capable of teaching me the truth. Ambrosius alone deserves the title of bishop.”