If you instruct the brothers of these things, you will be a good servant of Christ Jesus, nourished in the words of the faith, and of the good doctrine which you have followed.
In the words of faith and of good doctrine. Faith is here taken for the sum of Christian doctrine; and what he immediately adds, about good doctrine, is for the sake of explanation; (73) for he means, that all other doctrines, how plausible so ever they may be, are not at all profitable. 