Institutio Oratoria

And yet even then, whatever his deficiencies, he spoke not badly, but merely less well. Therefore before ever he fall a prey to the ambush where time lies in wait for him, the orator should sound the retreat and seek harbour while his ship is yet intact. For the fruits of his studies will not be lessened by retirement. Either he will bequeath the history of his own times for the delight of after ages, or will interpret the law to those who seek his counsels, as Lucius Crassus proposes

His house will, as in the days of old, be thronged by all the best of the rising generation, who will seek to learn from him as from an oracle how they may find the path to true eloquence. And he as their father in the art will mould them to all excellence, and like some old pilot will teach them of the shores whereby their ships must sail, of the harbours where they may shelter, and the signs of the weather, and will expound to them what they shall do when the breeze is fair or the tempest blows. Whereto he will be inclined not only by the common duty of humanity, but by a certain passion for the task that once was his, since no man desires that the art wherein he was once supreme should suffer decay or diminution.