But continue thou in the things which thou hast learned. — But Timothy, on the other hand, was to continue in the things he had learned. Evil teaching would become worse; the opposition to truth would, as the ages rolled on, become more intense; but Timothy and his successors must remember that there was to be no development in the fundamental doctrines of his most holy faith. He had (2 Timothy 3:10) fully known St. Paul’s doctrine — that doctrine which St. Paul had received directly from the Holy Spirit of God.
Knowing of whom thou hast learned them. — There is some doubt whether the Greek word rendered “whom” is in the singular or plural, the older authorities being nearly equally balanced. The reading here of the singular has been adopted with the Syriac versions, Chrysostom, Augustine, and the Vulgate. The reference then is to St. Paul. If the plural, were adopted, then the reference would probably be to St. Paul and Barnabas, or to some other distinguished teacher. Some commentators believe that Lois and Eunice are here alluded to, the pious mother and grandmother of Timothy. This, however, seems unlikely: for such a reminiscence, although a touching memory and one likely to appeal to his affection, would hardly be of that weighty and important character as to warrant its introduction into this solemn exhortation; besides, any reference to home and family reminiscences would be included in the next verse: “From a child thou hast known,” &c.