Canon 19 Preaching Scripture as the Fathers interpreted it

That those who preside over the churches ought, every day, but especially on the Lord's days, to teach all the clergy and the people the words of piety, gathering from the divine Scripture the thoughts and judgements of the truth, and not transgressing the definitions already laid down, or the tradition from the God-bearing Fathers. And if a word of Scripture should be raised, let them not interpret it otherwise than as the luminaries and teachers of the Church have set it forth through their own writings; and let them rather win approval in these than by composing discourses of their own; lest at times, being at a loss for this, they should fall away from what is fitting. For through the teaching of the aforesaid Fathers the peoples, coming to knowledge of what is excellent and to be chosen, and of what is unprofitable and to be rejected, reform their life for the better, and are not caught by the passion of ignorance, but, attending to the teaching, they whet themselves not to suffer evil, and, by fear of the punishments hanging over them, work out their own salvation.