13 Is there any man in his right senses who would declare that in a single sermon he had discussed the faith and all the doctrines of the Church? Pray show me what that lesson is which is so seasoned with the whole savour of Scripture that its occurrence in the service induced you to enter the arena and put your wit to the hazard. And if you had not been overwhelmed by the torrent of your eloquence, you might have been convinced that it was impossible for you to speak upon the whole circle of doctrines without any deliberation.
But how stands the case? You promise one thing and present another. Our custom is, for the space of forty days, to deliver public lectures to those who are to be baptized on the doctrine of the Holy and Adorable Trinity. If the lesson for the day stimulated you to discuss all doctrines in a single hour, what necessity was there to repeat the instruction of the previous forty days? But if you meant to recapitulate what you had been saying during the whole of Lent, how could one lesson on a certain day “stir you up” to speak of all these doctrines?
But even here his language is ambiguous; for possibly he took occasion, from the particular lesson, to go over summarily what he was accustomed to deliver in church to the candidates for baptism during the forty days of Lent. For it is eloquence all the same whether few things are said in many words, or many things in few words. There is another permissible meaning, that, as soon as the one lesson gave him the spur, he was fired with such oratorical zeal that for forty days he never ceased speaking. But, then, even the easy-going old man, who was hanging upon his lips, and longing to know what he had never heard before, must have almost fallen from his seat asleep. However, we must put up with it; perhaps this, also, is a case of the simplicity which we know to be his manner.
Source: To Pammachius Against John of Jerusalem (New Advent)