I. Introductory.
By God's precepts and the Apostle's admonitions we are incited to keep a careful watch over the state of all the churches: and, if anywhere ought is found that needs rebuke, to recall men with speedy care either from the stupidity of ignorance or from forwardness and presumption. For inasmuch as we are warned by the Lord's own command whereby the blessed Apostle Peter had the thrice repeated mystical injunction pressed upon him, that he who loves Christ should feed Christ's sheep, we are compelled by reverence for that see which, by the abundance of the Divine Grace, we hold, to shun the danger of sloth as much as possible: lest the confession of the chief Apostle whereby he testified that he loved God be not found in us: because if he (through us) carelessly feed the flock so often commended to him he is proved not to love the chief Shepherd.
Source: Letters (New Advent)