Though those churches in the country of Judea had never seen Paul's person, yet they had heard of him:
1. That he had been a persecutor of those which professed the doctrine of the gospel, which he here calleth the faith, it being the object and the means of faith.
2. That there was such a change wrought in him, as that he was now become a preacher of that doctrine, for the profession of which he had formerly wasted and destroyed, the churches of Christ.