Christ is become of no effect unto you, whosoever of you are justified by the law; you are fallen from grace.
All Commentaries on Galatians 5:4 Go To Galatians 5
Augustine of Hippo
AD 430
Because it is they, not Christ, who are injured, he adds: “you have fallen from grace.” For when the effect of Christ’s grace is that those who were debtors to the works of the law were freed from this debt, these people, ungrateful to such great grace, prefer to be debtors to the whole law. Now this had not yet happened, but, because the will had begun to be moved, he therefore speaks frequently as though it had already happened.