Constantine the Great forbade the persecution of Christians, Theodosius the Great went one step further: he forbade idol sacrifices in his land. He also took care of the Orthodox faith against heretics. He expelled the Arian archbishop Demophilos from Constantinople and brought into the Church of the Holy Apostles in Constantinople Saint Gregory the Theologian.
He was so pious that he was worthy to perform miracles during his life. Thus, wanting to venerate the holy places in Jerusalem, he put on a simple outfit, and went to the Temple of the Holy Resurrection and knocked on the door. A churchman opened it for him, and he entered the temple, and - O the miracle! - the chandeliers, which had hitherto been extinguished, all of a sudden ignited on their own, as if on some great festival. Astonished by this miracle, the churchman informed the patriarch about it. The patriarch, through his prayer to God, found out who it was, and glorified God.
He transcribed the Holy Gospel with his own hands, and read it every day.
He departed to the Lord on January 17, 395 in Milan. His relics were transferred to Constantinople and buried there.
Blessed Augustine says that Emperor Theodosius often said that he was more happy to be a member of the Church of God than to be emperor over the whole earth.