St. Paul the Apostle entrusted the task of teaching and preaching to his disciples the bishops. He said to his disciple St. Timothy: "Preach the word! Be ready in season and out of season. Convince, rebuke, exhort, with all longsuffering and teaching" (2Tim.4: 2). And to his disciple Bishop Titus, he said: "Speak these things, exhort, and rebuke with all authority. Let no one despise you" (Titus 2:15).