St. Leo on the Canons

Pope St. Leo the Great ca. 400-461

We have just and reasonable reason for rejoicing, when we learn that the Lord’s priests have done what is agreeable both to the rules of the Father’s canons and to the Apostles‘ institutions. For the whole body of the Church must needs increase with a healthy growth, if the governing members excel in the strength of their authority, and in peaceful management. (Letter 40)