I. He commends Anatolius for his orthodoxy, but condemns him for his presumption.
Leo, the bishop, to Anatolius, the bishop.
Now that the light of Gospel Truth has been manifested, as we wished, through God's grace, and the night of most pestilential error has been dispelled from the universal Church, we are unspeakably glad in the Lord, because the difficult charge entrusted to us has been brought to the desired conclusion, even as the text of your letter announces, so that, according to the Apostle's teaching, “we all speak the same thing, and that there be no schisms among us: but that we be perfect in the same mind and in the same knowledge.” In devotion to which work we commend you, beloved, for taking part: for thus you benefited those who needed correction by your activity, and purged yourself from all complicity with the transgressors. For when your predecessor Flavian, of happy memory, was deposed for his defence of Catholic Truth, not unjustly it was believed that your ordainers seemed to have consecrated one like themselves, contrary to the provision of the holy canons. But God's mercy was present in this, directing and confirming you, that you might make good use of bad beginnings, and show that you were promoted not by men's judgment, but by God's loving-kindness: and this may be accepted as true, on condition that you lose not the grace of this Divine gift by another cause of offense. For the Catholic, and especially the Lord's priest, must not only be entangled in no error, but also be corrupted by no covetousness; for, as says the Holy Scripture, “Go not after your lusts, and decline from your desire.” Many enticements of this world, many vanities must be resisted, that the perfection of true self-discipline may be attained the first blemish of which is pride, the beginning of transgression and the origin of sin. For the mind greedy of power knows not either how to abstain from things forbidden nor to enjoy things permitted, so long as transgressions go unpunished and run into undisciplined and wicked excesses, and wrong doings are multiplied, which were only endured in our zeal for the restoration of the Faith and love of harmony.
Source: Letters (New Advent)