I. He excuses his absence from the Synod, and introduces his representatives.
Leo, the bishop of the city of Rome, to the holy Synod, assembled at Nicæa.
I had indeed prayed, dearly beloved, on behalf of my dear colleagues that all the Lord's priests would persist in united devotion to the Catholic Faith, and that no one would be misled by favour or fear of secular powers into departure from the way of Truth; but because many things often occur to produce penitence and God's mercy transcends the faults of delinquents, and vengeance is postponed in order that reformation may have place, we must make much of our most merciful prince's piously intentioned Council, in which he has desired your holy brotherhood to assemble for the purpose of destroying the snares of the devil and restoring the peace of the Church, so far respecting the rights and dignity of the most blessed Apostle Peter as to invite us too by letter to vouchsafe our presence at your venerable Synod. That indeed is not permitted either by the needs of the times or by any precedent. Yet in these brethren, that is Paschasinus and Lucentius, bishops, Boniface and Basil, presbyters, who have been deputed by the Apostolic See, let your brotherhood reckon that I am presiding at the Synod; for my presence is not withdrawn from you, who am now represented by my vicars, and have this long time been really with you in the proclaiming of the Catholic Faith: so that you who cannot help knowing what we believe in accordance with ancient tradition, cannot doubt what we desire.
Source: Letters (New Advent)