One of the gifts of Christ (Eph. 4:8) to the Church are shepherds and teachers, perfecting other believers for the work of the ministry, that is for the building up of the Body of Christ (11-12). Paul charged Timothy to commit things he heard from him to faithful men, who will be competent to teach others also (2 Tim. 2:2). Apostle's two year training in Acts 19:9-10 caused mighty growth of the word and spread in all of Asia.