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.
whereunto thou hast attained; he had arrived to a considerable degree of knowledge of Gospel truths, and was still pursuing and following on to know more of them, and was exhorted to continue in them, knowing of whom he had learned them. All this is said by way of encouragement to him to do as the apostle directs.