(For he that worked effectually in Peter to the apostleship of the circumcision, the same was mighty in me toward the Gentiles:)
All Commentaries on Galatians 2:8 Go To Galatians 2
Irenaeus of Lyons
AD 202
With regard to those (the Marcionites) who allege that Paul alone knew the truth, and that to him the mystery was manifested by revelation, let Paul himself convict them, when he says, that one and the same God wrought in Peter for the apostolate of the circumcision, and in himself for the Gentiles.