Institutio Oratoria
Quintilian
Quintilian. Institutio Oratoria, Volume 1-4. Butler, Harold Edgeworth, translator. Cambridge, Mass; London: Harvard University Press, William Heinemann Ltd., 1920-1922.
Beginners must be given a subject
v1-3 p.261
sketched out ready for treatment and suitable to their respective powers. But when they show that they have formed themselves sufficiently closely on the models placed before them, it will be sufficient to give them a few brief hints for their guidance and to allow them to advance trusting in their own strength and without external support. Sometimes they should be left entirely to their own devices, that they may not be spoilt by the bad habit of always relying on another's efforts, and so prove incapable of effort and originality. But as soon as they seem to have acquired a sound conception of what they ought to say, the teacher's work will be near completion: if they still make some mistakes, they must be brought back under his guidance.