Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified.
All Commentaries on Galatians 2:16 Go To Galatians 2
Tertullian of Carthage
AD 220
But what do the Marcionites wish to have believed (on the point)? For the rest, the apostle must (be permitted to) go on with his own statement, wherein he says that "a man is not justified by the works of the law, but by faith: ".
in order that thenceforward man might be justified by the liberty of faith, not by servitude to the law,