A second reason is because, though many people have been well-pleasing to God, they were through outstanding virtue unknown to humanity by name, or for some human reason or other, but nevertheless have great glory in God’s sight. Or again, because there are many who have lived following Christ in India, Egypt, Arabia. Mesopotamia and Phrygia and in the lands beyond the Black Sea, even as far as the British Isles themselves; in short, in both East and West, but it was not easy to honour them all properly because of their vast numbers, in the way that ecclesiastical custom has been received. And therefore, so that we may attract the help of them all, wherever on earth they were well-pleasing to God, and generally for those who would later become Saints, the most godly Fathers ordained that we should celebrate the feast of All Saints, honouring the earlier and later ones, the unknown and the known — all those in whom the Holy Spirit has dwelt he has made holy.
A third reason is this. It was necessary for the Saints who are celebrated individually day by day to be gathered together on one day, in order to demonstrate that, as they struggled for the one Christ and all ran the race in the same stadium of virtue, so they were all fittingly crowned as servants of one God and sustained the Church, having filled the world on high. They stir us also to accomplish the same struggle in its different and many forms, to the degree of power that each of us has to press onwards with all eagerness.
For all these Saints from every age the revered and wise Emperor Leo erected and vast and very beautiful church. This is very near the church of the holy Apostles, within the city of Constantine. He built it originally, it is said, for his first wife Theophano, who was outstandingly well-pleasing to God, which was indeed a marvel in the midst of turmoil and in royal palaces. When he informed the Church of his idea, he did not succeed in making it agree with his wishes
The most wise Emperor, with the approval of the whole Church, dedicated to all the Saints everywhere in the world the building that had been erected, observing that ‘Since Theophano is a Saint, let her be numbered with the rest.
At the prayers of your all-pure Mother, Christ God, and of all your Saints from every age, have mercy and save us, for you alone are good and love mankind. Amen.