Saint Peter Damian

Let us faithfully transmit to posterity the example of virtue which we have received from our forefathers.

 -- Saint Peter Damian 

Saint Thomas Becket

The harvest is good and one reaper or even several would not suffice to gather all of it into the granary of the Lord. Yet the Roman Church remains the head of all the churches and the source of Catholic teaching. Of this there can be no doubt. Everyone knows that the keys of the kingdom of heaven were given to Peter. Upon his faith and teaching the whole fabric of the Church will continue to be built until we all reach full maturity in Christ and attain to unity in faith and knowledge of the Son of God. 

-- Saint Thomas Becket

Saint Irenaeus of Lyons

If one carefully reads the Scriptures, he will find there the word on the subject of Christ -- de Christo sermonem -- and the prefiguration of the new calling. He is indeed the hidden treasure in the field -- the field in fact is the world -- but in truth, the hidden treasure in the Scriptures is Christ. Because he is designed by types and words that humanly are not possible to understand before the accomplishment of all things, that is, Christ's parousia (coming).

-- Saint Irenaeus of Lyons