had heard. were hearing: i.e. kept hearing. These are strong Imperfects.
the faith. Greek. pistis App-150.
destroyed. Same as "wasted", Galatians 1:13.
Related Commentaries of Galatians 1:23
Galatians 1:23
23 But they had heard only, That he which persecuted us in times past now preacheth the faith which once he destroyed.