5 Such presbyters does the Church nourish, of whom also the prophet says: “I will give your rulers in peace, and your bishops in righteousness.” Of whom also did the Lord declare, “Who then shall be a faithful steward (actor), good and wise, whom the Lord sets over His household, to give them their meat in due season? Blessed is that servant whom his Lord, when He comes, shall find so doing.” Paul then, teaching us where one may find such, says, “God has placed in the Church, first, apostles; secondly, prophets; thirdly, teachers.” Where, therefore, the gifts of the Lord have been placed, there it behooves us to learn the truth, [namely,] from those who possess that succession of the Church which is from the apostles, and among whom exists that which is sound and blameless in conduct, as well as that which is unadulterated and incorrupt in speech.
For these also preserve this faith of ours in one God who created all things; and they increase that love [which we have] for the Son of God, who accomplished such marvellous dispensations for our sake: and they expound the Scriptures to us without danger, neither blaspheming God, nor dishonouring the patriarchs, nor despising the prophets.
Source: Adversus haereses (New Advent)