NPNF2-10. Saint Jerome: Treatises: CE (NPNF2: 21 Volumes) (Volume 10)

The word Father is used in the New Testament to mean a teacher of spiritual things, by whose means the soul of man is born again into the likeness of Christ: "For if you have ten thousand instructors in Christ, yet not many fathers. For in Christ Jesus, by the gospel, I have begotten you. Wherefore I beseech you, be ye followers of me, as I also am of Christ" (1 Corinthians 4:15, 16; cf. Galatians 4:19). The first teachers of Christianity seem to be collectively spoken of as "the Fathers" (2 Peter 3:4).