I. He congratulates Theodoret on their joint victory, and expresses his approval of an honest inquiry which leads to good results.
Leo, the bishop, to his beloved brother Theodoret, the bishop.
On the return of our brothers and fellow priests, whom the See of the blessed Peter sent to the holy council, we ascertained, beloved, the victory you and we together had won by assistance from on high over the blasphemy of Nestorius, as well as over the madness of Eutyches. Wherefore we make our boast in the Lord, singing with the prophet: “our help is in the name of the Lord, who has made heaven and earth:” who has suffered us to sustain no harm in the person of our brethren, but has corroborated by the irrevocable assent of the whole brotherhood what He had already laid down through our ministry: to show that, what had been first formulated by the foremost See of Christendom, and then received by the judgment of the whole Christian world, had truly proceeded from Himself: that in this, too, the members may be at one with the Head. And herein our cause for rejoicing grows greater when we see that the more fiercely the foe assailed Christ's servants, the more did he afflict himself. For lest the assent of other Sees to that which the Lord of all has appointed to take precedence of the rest might seem mere complaisance, or lest any other evil suspicion might creep in, some were found to dispute our decisions before they were finally accepted. And while some, instigated by the author of the disagreement, rush forward into a warfare of contradictions, a greater good results through his fall under the guiding hand of the Author of all goodness. For the gifts of God's grace are sweeter to us when they are gained with mighty efforts: and uninterrupted peace is wont to seem a lesser good than one that is restored by labours. Moreover, the Truth itself shines more brightly, and is more bravely maintained when what the Faith had already taught is afterwards confirmed by further inquiry. And still further, the good name of the priestly office gains much in lustre where the authority of the highest is preserved without it being thought that the liberty of the lower ranks has been at all infringed. And the result of a discussion contributes to the greater glory of God when the debaters exert themselves with confidence in overcoming the gainsayers: that what of itself is shown wrong may not seem to be passed over in prejudicial silence.
Source: Letters (New Advent)